16312840 has 16 divisors (see below), whose sum is σ = 36703980. Its totient is φ = 6525120.

The previous prime is 16312823. The next prime is 16312841. The reversal of 16312840 is 4821361.

It can be written as a sum of positive squares in 2 ways, for example, as 16305444 + 7396 = 4038^2 + 86^2 .

It is a super-2 number, since 2×16312840² = 532217497731200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16312841) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 203871 + ... + 203950.

Almost surely, 2^16312840 is an apocalyptic number.

16312840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16312840 is an abundant number, since it is smaller than the sum of its proper divisors (20391140).

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

16312840 is a wasteful number, since it uses less digits than its factorization.

16312840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407832 (or 407828 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 16312840 is about 4038.9156960749. The cubic root of 16312840 is about 253.6159281062.

The spelling of 16312840 in words is "sixteen million, three hundred twelve thousand, eight hundred forty".