389728813890 has 64 divisors (see below), whose sum is σ = 1012073231232. Its totient is φ = 95478566400.

The previous prime is 389728813883. The next prime is 389728813921. The reversal of 389728813890 is 98318827983.

It is a happy number.

It is a super-2 number, since 2×389728813890² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2285731 + ... + 2450310.

It is an arithmetic number, because the mean of its divisors is an integer number (15813644238).

Almost surely, 2^389728813890 is an apocalyptic number.

389728813890 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

389728813890 is an abundant number, since it is smaller than the sum of its proper divisors (622344417342).

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

389728813890 is a wasteful number, since it uses less digits than its factorization.

389728813890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4736275.

The product of its (nonzero) digits is 41803776, while the sum is 66.

The spelling of 389728813890 in words is "three hundred eighty-nine billion, seven hundred twenty-eight million, eight hundred thirteen thousand, eight hundred ninety".