390831012 has 216 divisors, whose sum is σ = 1214478720. Its totient is φ = 104457600.

The previous prime is 390831011. The next prime is 390831013. The reversal of 390831012 is 210138093.

It is an interprime number because it is at equal distance from previous prime (390831011) and next prime (390831013).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390831011) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4947189 + ... + 4947267.

Almost surely, 2^390831012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 390831012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (607239360).

390831012 is an abundant number, since it is smaller than the sum of its proper divisors (823647708).

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

390831012 is a wasteful number, since it uses less digits than its factorization.

390831012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 390831012 is about 19769.4464262407. The cubic root of 390831012 is about 731.1329202868.

The spelling of 390831012 in words is "three hundred ninety million, eight hundred thirty-one thousand, twelve".