16949640 has 64 divisors (see below), whose sum is σ = 51269760. Its totient is φ = 4482560.

The previous prime is 16949633. The next prime is 16949707. The reversal of 16949640 is 4694961.

It is a super-2 number, since 2×16949640² = 574580592259200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15925 + ... + 16955.

It is an arithmetic number, because the mean of its divisors is an integer number (801090).

Almost surely, 2^16949640 is an apocalyptic number.

16949640 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 16949640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25634880).

16949640 is an abundant number, since it is smaller than the sum of its proper divisors (34320120).

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

16949640 is a wasteful number, since it uses less digits than its factorization.

16949640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1182 (or 1178 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 16949640 is about 4116.9940490606. The cubic root of 16949640 is about 256.8740064844.

The spelling of 16949640 in words is "sixteen million, nine hundred forty-nine thousand, six hundred forty".