389258493990 has 64 divisors (see below), whose sum is σ = 989250485760. Its totient is φ = 97688747520.

The previous prime is 389258493947. The next prime is 389258494069. The reversal of 389258493990 is 99394852983.

It is a super-2 number, since 2×389258493990² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

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, 9941271 + ... + 9980349.

It is an arithmetic number, because the mean of its divisors is an integer number (15457038840).

Almost surely, 2^389258493990 is an apocalyptic number.

389258493990 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

389258493990 is an abundant number, since it is smaller than the sum of its proper divisors (599991991770).

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

389258493990 is a wasteful number, since it uses less digits than its factorization.

389258493990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58637.

The product of its (nonzero) digits is 151165440, while the sum is 69.

The spelling of 389258493990 in words is "three hundred eighty-nine billion, two hundred fifty-eight million, four hundred ninety-three thousand, nine hundred ninety".