390886992 has 80 divisors (see below), whose sum is σ = 1124928000. Its totient is φ = 129954816.

The previous prime is 390886987. The next prime is 390886999. The reversal of 390886992 is 299688093.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390886999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205984 + ... + 207872.

It is an arithmetic number, because the mean of its divisors is an integer number (14061600).

Almost surely, 2^390886992 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 390886992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (562464000).

390886992 is an abundant number, since it is smaller than the sum of its proper divisors (734041008).

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

390886992 is a wasteful number, since it uses less digits than its factorization.

390886992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2385 (or 2373 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The square root of 390886992 is about 19770.8621966772. The cubic root of 390886992 is about 731.1678261376.

The spelling of 390886992 in words is "three hundred ninety million, eight hundred eighty-six thousand, nine hundred ninety-two".