390004992 has 216 divisors, whose sum is σ = 1255527000. Its totient is φ = 115605504.

The previous prime is 390004987. The next prime is 390004999. The reversal of 390004992 is 299400093.

It can be written as a sum of positive squares in 4 ways, for example, as 26873856 + 363131136 = 5184^2 + 19056^2 .

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

It is not an unprimeable number, because it can be changed into a prime (390004999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 868384 + ... + 868832.

It is an arithmetic number, because the mean of its divisors is an integer number (5812625).

Almost surely, 2^390004992 is an apocalyptic number.

390004992 is a gapful number since it is divisible by the number (32) 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 390004992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (627763500).

390004992 is an abundant number, since it is smaller than the sum of its proper divisors (865522008).

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

390004992 is a wasteful number, since it uses less digits than its factorization.

390004992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513 (or 496 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 390004992 is about 19748.5440476001. The cubic root of 390004992 is about 730.6174746809.

The spelling of 390004992 in words is "three hundred ninety million, four thousand, nine hundred ninety-two".