391966232 has 64 divisors (see below), whose sum is σ = 888330240. Its totient is φ = 158572800.

The previous prime is 391966171. The next prime is 391966243. The reversal of 391966232 is 232669193.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a self number, because there is not a number n which added to its sum of digits gives 391966232.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68423 + ... + 73929.

It is an arithmetic number, because the mean of its divisors is an integer number (13880160).

Almost surely, 2^391966232 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 391966232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (444165120).

391966232 is an abundant number, since it is smaller than the sum of its proper divisors (496364008).

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

391966232 is a wasteful number, since it uses less digits than its factorization.

391966232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5592 (or 5588 counting only the distinct ones).

The product of its digits is 104976, while the sum is 41.

The square root of 391966232 is about 19798.1370840794. The cubic root of 391966232 is about 731.8401265312.

The spelling of 391966232 in words is "three hundred ninety-one million, nine hundred sixty-six thousand, two hundred thirty-two".