390166725840 has 40 divisors (see below), whose sum is σ = 1209516850848. Its totient is φ = 104044460160.

The previous prime is 390166725821. The next prime is 390166725863. The reversal of 390166725840 is 48527661093.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 812847106 + ... + 812847585.

It is a 1-persistent number, because it is pandigital, but 2⋅390166725840 = 780333451680 is not.

Almost surely, 2^390166725840 is an apocalyptic number.

390166725840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

390166725840 is an abundant number, since it is smaller than the sum of its proper divisors (819350125008).

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

390166725840 is a wasteful number, since it uses less digits than its factorization.

390166725840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625694707 (or 1625694701 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 51.

The spelling of 390166725840 in words is "three hundred ninety billion, one hundred sixty-six million, seven hundred twenty-five thousand, eight hundred forty".