28312361394 has 32 divisors (see below), whose sum is σ = 57705851520. Its totient is φ = 9257344512.

The previous prime is 28312361353. The next prime is 28312361401. The reversal of 28312361394 is 49316321382.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2244834 + ... + 2257410.

It is an arithmetic number, because the mean of its divisors is an integer number (1803307860).

Almost surely, 2^28312361394 is an apocalyptic number.

28312361394 is an abundant number, since it is smaller than the sum of its proper divisors (29393490126).

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

28312361394 is a wasteful number, since it uses less digits than its factorization.

28312361394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19714.

The product of its digits is 186624, while the sum is 42.

It can be divided in two parts, 2831 and 2361394, that added together give a triangular number (2364225 = T₂₁₇₄).

The spelling of 28312361394 in words is "twenty-eight billion, three hundred twelve million, three hundred sixty-one thousand, three hundred ninety-four".