392990994 has 64 divisors (see below), whose sum is σ = 955584000. Its totient is φ = 118728720.

The previous prime is 392990993. The next prime is 392991013. The reversal of 392990994 is 499099293.

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

It is a self number, because there is not a number n which added to its sum of digits gives 392990994.

It is not an unprimeable number, because it can be changed into a prime (392990993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 248097 + ... + 249675.

It is an arithmetic number, because the mean of its divisors is an integer number (14931000).

Almost surely, 2^392990994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 392990994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (477792000).

392990994 is an abundant number, since it is smaller than the sum of its proper divisors (562593006).

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

392990994 is a wasteful number, since it uses less digits than its factorization.

392990994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020 (or 2014 counting only the distinct ones).

The product of its (nonzero) digits is 1417176, while the sum is 54.

The square root of 392990994 is about 19824.0004539952. Note that the first 3 decimals coincide. The cubic root of 392990994 is about 732.4773492202.

The spelling of 392990994 in words is "three hundred ninety-two million, nine hundred ninety thousand, nine hundred ninety-four".