16860042 has 64 divisors (see below), whose sum is σ = 39346560. Its totient is φ = 5346432.

The previous prime is 16860037. The next prime is 16860047. The reversal of 16860042 is 24006861.

16860042 is a `hidden beast` number, since 16 + 8 + 600 + 42 = 666.

It is an interprime number because it is at equal distance from previous prime (16860037) and next prime (16860047).

It is a super-2 number, since 2×16860042² = 568522032483528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 16859988 and 16860015.

It is not an unprimeable number, because it can be changed into a prime (16860047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122998 + ... + 123134.

It is an arithmetic number, because the mean of its divisors is an integer number (614790).

Almost surely, 2^16860042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16860042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19673280).

16860042 is an abundant number, since it is smaller than the sum of its proper divisors (22486518).

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

16860042 is a wasteful number, since it uses less digits than its factorization.

16860042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 16860042 is about 4106.0981478771. The cubic root of 16860042 is about 256.4205834642.

The spelling of 16860042 in words is "sixteen million, eight hundred sixty thousand, forty-two".