621201280 has 64 divisors (see below), whose sum is σ = 1697222880. Its totient is φ = 212981760.

The previous prime is 621201277. The next prime is 621201337. The reversal of 621201280 is 82102126.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64851 + ... + 73810.

Almost surely, 2^621201280 is an apocalyptic number.

It is an amenable number.

621201280 is an abundant number, since it is smaller than the sum of its proper divisors (1076021600).

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

621201280 is a wasteful number, since it uses less digits than its factorization.

621201280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138687 (or 138675 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 621201280 is about 24923.9098056465. The cubic root of 621201280 is about 853.2522600928.

The spelling of 621201280 in words is "six hundred twenty-one million, two hundred one thousand, two hundred eighty".