16157990 has 24 divisors (see below), whose sum is σ = 30901392. Its totient is φ = 6081920.

The previous prime is 16157971. The next prime is 16157993. The reversal of 16157990 is 9975161.

It is a super-2 number, since 2×16157990² = 522161281680200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16157993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95 + ... + 5685.

It is an arithmetic number, because the mean of its divisors is an integer number (1287558).

Almost surely, 2^16157990 is an apocalyptic number.

16157990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16157990 is a deficient number, since it is larger than the sum of its proper divisors (14743402).

16157990 is a wasteful number, since it uses less digits than its factorization.

16157990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5632 (or 5615 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 38.

The square root of 16157990 is about 4019.7002375799. The cubic root of 16157990 is about 252.8108904638.

The spelling of 16157990 in words is "sixteen million, one hundred fifty-seven thousand, nine hundred ninety".