390756540 has 24 divisors (see below), whose sum is σ = 1094118480. Its totient is φ = 104201728.

The previous prime is 390756539. The next prime is 390756551. The reversal of 390756540 is 45657093.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3256245 + ... + 3256364.

It is an arithmetic number, because the mean of its divisors is an integer number (45588270).

Almost surely, 2^390756540 is an apocalyptic number.

390756540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

390756540 is an abundant number, since it is smaller than the sum of its proper divisors (703361940).

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

390756540 is a wasteful number, since it uses less digits than its factorization.

390756540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6512621 (or 6512619 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 39.

The square root of 390756540 is about 19767.5628239801. The cubic root of 390756540 is about 731.0864787406.

The spelling of 390756540 in words is "three hundred ninety million, seven hundred fifty-six thousand, five hundred forty".