16231690 has 8 divisors (see below), whose sum is σ = 29217060. Its totient is φ = 6492672.

The previous prime is 16231687. The next prime is 16231697. The reversal of 16231690 is 9613261.

It can be written as a sum of positive squares in 2 ways, for example, as 15673681 + 558009 = 3959^2 + 747^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×16231690² = 526935520512200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16231697) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 811575 + ... + 811594.

Almost surely, 2^16231690 is an apocalyptic number.

16231690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16231690 is a deficient number, since it is larger than the sum of its proper divisors (12985370).

16231690 is a wasteful number, since it uses less digits than its factorization.

16231690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623176.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 16231690 is about 4028.8571580536. The cubic root of 16231690 is about 253.1946821315.

The spelling of 16231690 in words is "sixteen million, two hundred thirty-one thousand, six hundred ninety".