16312788 has 18 divisors (see below), whose sum is σ = 41235194. Its totient is φ = 5437584.

The previous prime is 16312787. The next prime is 16312823. The reversal of 16312788 is 88721361.

It can be written as a sum of positive squares in only one way, i.e., 11168964 + 5143824 = 3342^2 + 2268^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×16312788² = 532214104665888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 453133 = 16312788 / (1 + 6 + 3 + 1 + 2 + 7 + 8 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16312787) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 226531 + ... + 226602.

Almost surely, 2^16312788 is an apocalyptic number.

16312788 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16312788 is an abundant number, since it is smaller than the sum of its proper divisors (24922406).

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

16312788 is a wasteful number, since it uses less digits than its factorization.

16312788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453143 (or 453138 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 16312788 is about 4038.9092586984. The cubic root of 16312788 is about 253.6156586244.

The spelling of 16312788 in words is "sixteen million, three hundred twelve thousand, seven hundred eighty-eight".