28918186738 has 16 divisors (see below), whose sum is σ = 49601787840. Its totient is φ = 12386570256.

The previous prime is 28918186733. The next prime is 28918186769. The reversal of 28918186738 is 83768181982.

It is not an unprimeable number, because it can be changed into a prime (28918186733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 552256 + ... + 602347.

It is an arithmetic number, because the mean of its divisors is an integer number (3100111740).

Almost surely, 2^28918186738 is an apocalyptic number.

28918186738 is a deficient number, since it is larger than the sum of its proper divisors (20683601102).

28918186738 is a wasteful number, since it uses less digits than its factorization.

28918186738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156401.

The product of its digits is 9289728, while the sum is 61.

The spelling of 28918186738 in words is "twenty-eight billion, nine hundred eighteen million, one hundred eighty-six thousand, seven hundred thirty-eight".