28400253730 has 48 divisors (see below), whose sum is σ = 52377453432. Its totient is φ = 11084486400.

The previous prime is 28400253719. The next prime is 28400253751. The reversal of 28400253730 is 3735200482.

It can be written as a sum of positive squares in 4 ways, for example, as 23451553321 + 4948700409 = 153139^2 + 70347^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10466854 + ... + 10469566.

Almost surely, 2^28400253730 is an apocalyptic number.

28400253730 is a deficient number, since it is larger than the sum of its proper divisors (23977199702).

28400253730 is a wasteful number, since it uses less digits than its factorization.

28400253730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3043 (or 2912 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 34.

The spelling of 28400253730 in words is "twenty-eight billion, four hundred million, two hundred fifty-three thousand, seven hundred thirty".