390818736 has 320 divisors, whose sum is σ = 1447526400. Its totient is φ = 97977600.

The previous prime is 390818731. The next prime is 390818759. The reversal of 390818736 is 637818093.

It is a happy number.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 390818691 and 390818700.

It is not an unprimeable number, because it can be changed into a prime (390818731) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1030995 + ... + 1031373.

It is an arithmetic number, because the mean of its divisors is an integer number (4523520).

Almost surely, 2^390818736 is an apocalyptic number.

390818736 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 390818736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (723763200).

390818736 is an abundant number, since it is smaller than the sum of its proper divisors (1056707664).

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

390818736 is a wasteful number, since it uses less digits than its factorization.

390818736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 390818736 is about 19769.1359446993. The cubic root of 390818736 is about 731.1252652463.

The spelling of 390818736 in words is "three hundred ninety million, eight hundred eighteen thousand, seven hundred thirty-six".