28631092 has 18 divisors (see below), whose sum is σ = 58285122. Its totient is φ = 12270384.

The previous prime is 28631069. The next prime is 28631093. The reversal of 28631092 is 29013682.

It can be written as a sum of positive squares in only one way, i.e., 18352656 + 10278436 = 4284^2 + 3206^2 .

It is a super-2 number, since 2×28631092² = 1639478858224928, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28631093) 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 5 ways as a sum of consecutive naturals, for example, 72843 + ... + 73234.

Almost surely, 2^28631092 is an apocalyptic number.

It is an amenable number.

28631092 is an abundant number, since it is smaller than the sum of its proper divisors (29654030).

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

28631092 is a wasteful number, since it uses less digits than its factorization.

28631092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146095 (or 146086 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 28631092 is about 5350.8029304021. The cubic root of 28631092 is about 305.9233578542.

The spelling of 28631092 in words is "twenty-eight million, six hundred thirty-one thousand, ninety-two".