390922740 has 192 divisors, whose sum is σ = 1320883200. Its totient is φ = 95413248.

The previous prime is 390922729. The next prime is 390922759. The reversal of 390922740 is 47229093.

390922740 is a `hidden beast` number, since 390 + 9 + 227 + 40 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 390922695 and 390922704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1635541 + ... + 1635779.

It is an arithmetic number, because the mean of its divisors is an integer number (6879600).

Almost surely, 2^390922740 is an apocalyptic number.

390922740 is a gapful number since it is divisible by the number (30) 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 390922740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (660441600).

390922740 is an abundant number, since it is smaller than the sum of its proper divisors (929960460).

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

390922740 is a wasteful number, since it uses less digits than its factorization.

390922740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 390922740 is about 19771.7662336980. The cubic root of 390922740 is about 731.1901147540.

The spelling of 390922740 in words is "three hundred ninety million, nine hundred twenty-two thousand, seven hundred forty".