390389076 has 324 divisors, whose sum is σ = 1324552320. Its totient is φ = 96465600.

The previous prime is 390389057. The next prime is 390389141. The reversal of 390389076 is 670983093.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 6616735 + ... + 6616793.

Almost surely, 2^390389076 is an apocalyptic number.

390389076 is a gapful number since it is divisible by the number (36) 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 390389076, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (662276160).

390389076 is an abundant number, since it is smaller than the sum of its proper divisors (934163244).

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

390389076 is a wasteful number, since it uses less digits than its factorization.

390389076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136 (or 113 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 390389076 is about 19758.2660170370. The cubic root of 390389076 is about 730.8572377770.

The spelling of 390389076 in words is "three hundred ninety million, three hundred eighty-nine thousand, seventy-six".