621780096 has 64 divisors (see below), whose sum is σ = 1887554880. Its totient is φ = 177650688.

The previous prime is 621780053. The next prime is 621780101. The reversal of 621780096 is 690087126.

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

It is a super-2 number, since 2×621780096² = 773220975563538432, which contains 22 as substring.

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, 112971 + ... + 118346.

It is an arithmetic number, because the mean of its divisors is an integer number (29493045).

Almost surely, 2^621780096 is an apocalyptic number.

It is an amenable number.

621780096 is an abundant number, since it is smaller than the sum of its proper divisors (1265774784).

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

621780096 is a wasteful number, since it uses less digits than its factorization.

621780096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231341 (or 231329 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 621780096 is about 24935.5187634025. The cubic root of 621780096 is about 853.5171891170.

The spelling of 621780096 in words is "six hundred twenty-one million, seven hundred eighty thousand, ninety-six".