501261408 has 72 divisors (see below), whose sum is σ = 1460263896. Its totient is φ = 163008000.

The previous prime is 501261373. The next prime is 501261421. The reversal of 501261408 is 804162105.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9418 + ... + 33033.

It is an arithmetic number, because the mean of its divisors is an integer number (20281443).

Almost surely, 2^501261408 is an apocalyptic number.

It is an amenable number.

501261408 is an abundant number, since it is smaller than the sum of its proper divisors (959002488).

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

501261408 is a wasteful number, since it uses less digits than its factorization.

501261408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42508 (or 42497 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 501261408 is about 22388.8679481567. The cubic root of 501261408 is about 794.3674189441.

The spelling of 501261408 in words is "five hundred one million, two hundred sixty-one thousand, four hundred eight".