16156840 has 64 divisors (see below), whose sum is σ = 43747200. Its totient is φ = 5246208.

The previous prime is 16156837. The next prime is 16156867. The reversal of 16156840 is 4865161.

It is a super-2 number, since 2×16156840² = 522086957571200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3802 + ... + 6838.

It is an arithmetic number, because the mean of its divisors is an integer number (683550).

Almost surely, 2^16156840 is an apocalyptic number.

16156840 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 16156840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21873600).

16156840 is an abundant number, since it is smaller than the sum of its proper divisors (27590360).

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

16156840 is a wasteful number, since it uses less digits than its factorization.

16156840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3074 (or 3070 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 16156840 is about 4019.5571895422. The cubic root of 16156840 is about 252.8048926175.

The spelling of 16156840 in words is "sixteen million, one hundred fifty-six thousand, eight hundred forty".