621962880 has 384 divisors, whose sum is σ = 2520020160. Its totient is φ = 129024000.

The previous prime is 621962839. The next prime is 621962899. The reversal of 621962880 is 88269126.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1034580 + ... + 1035180.

Almost surely, 2^621962880 is an apocalyptic number.

621962880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621962880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1260010080).

621962880 is an abundant number, since it is smaller than the sum of its proper divisors (1898057280).

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

621962880 is a wasteful number, since it uses less digits than its factorization.

621962880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648 (or 629 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 621962880 is about 24939.1836273764. The cubic root of 621962880 is about 853.6008167543.

The spelling of 621962880 in words is "six hundred twenty-one million, nine hundred sixty-two thousand, eight hundred eighty".