28737385786 has 16 divisors (see below), whose sum is σ = 45739489536. Its totient is φ = 13494510016.

The previous prime is 28737385777. The next prime is 28737385799. The reversal of 28737385786 is 68758373782.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 889066 + ... + 920821.

It is an arithmetic number, because the mean of its divisors is an integer number (2858718096).

Almost surely, 2^28737385786 is an apocalyptic number.

28737385786 is a deficient number, since it is larger than the sum of its proper divisors (17002103750).

28737385786 is a wasteful number, since it uses less digits than its factorization.

28737385786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810373.

The product of its digits is 94832640, while the sum is 64.

The spelling of 28737385786 in words is "twenty-eight billion, seven hundred thirty-seven million, three hundred eighty-five thousand, seven hundred eighty-six".