390218832 has 60 divisors (see below), whose sum is σ = 1101781044. Its totient is φ = 128916480.

The previous prime is 390218831. The next prime is 390218839. The reversal of 390218832 is 238812093.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1971216 + 388247616 = 1404^2 + 19704^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390218831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4282 + ... + 28262.

Almost surely, 2^390218832 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 390218832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (550890522).

390218832 is an abundant number, since it is smaller than the sum of its proper divisors (711562212).

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

390218832 is a wasteful number, since it uses less digits than its factorization.

390218832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24108 (or 24099 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 390218832 is about 19753.9573756754. The cubic root of 390218832 is about 730.7509829676.

The spelling of 390218832 in words is "three hundred ninety million, two hundred eighteen thousand, eight hundred thirty-two".