28605631404 has 36 divisors (see below), whose sum is σ = 77643858264. Its totient is φ = 8173037376.

The previous prime is 28605631381. The next prime is 28605631429. The reversal of 28605631404 is 40413650682.

It is a super-2 number, since 2×28605631404² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24323929 + ... + 24325104.

Almost surely, 2^28605631404 is an apocalyptic number.

It is an amenable number.

28605631404 is an abundant number, since it is smaller than the sum of its proper divisors (49038226860).

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

28605631404 is a wasteful number, since it uses less digits than its factorization.

28605631404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48649054 (or 48649045 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 28605631404 in words is "twenty-eight billion, six hundred five million, six hundred thirty-one thousand, four hundred four".