16699140 has 72 divisors (see below), whose sum is σ = 51164568. Its totient is φ = 4408320.

The previous prime is 16699139. The next prime is 16699141. The reversal of 16699140 is 4199661.

It is an interprime number because it is at equal distance from previous prime (16699139) and next prime (16699141).

It can be written as a sum of positive squares in 4 ways, for example, as 248004 + 16451136 = 498^2 + 4056^2 .

It is a super-2 number, since 2×16699140² = 557722553479200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 16699095 and 16699104.

It is not an unprimeable number, because it can be changed into a prime (16699141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19930 + ... + 20750.

It is an arithmetic number, because the mean of its divisors is an integer number (710619).

Almost surely, 2^16699140 is an apocalyptic number.

16699140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16699140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25582284).

16699140 is an abundant number, since it is smaller than the sum of its proper divisors (34465428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16699140 is a wasteful number, since it uses less digits than its factorization.

16699140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949 (or 944 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 16699140 is about 4086.4581240972. The cubic root of 16699140 is about 255.6022673137.

The spelling of 16699140 in words is "sixteen million, six hundred ninety-nine thousand, one hundred forty".