621670080 has 112 divisors (see below), whose sum is σ = 1989734400. Its totient is φ = 164441088.

The previous prime is 621670067. The next prime is 621670087. The reversal of 621670080 is 80076126.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (621670087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119371 + ... + 124469.

Almost surely, 2^621670080 is an apocalyptic number.

621670080 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 621670080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (994867200).

621670080 is an abundant number, since it is smaller than the sum of its proper divisors (1368064320).

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

621670080 is a wasteful number, since it uses less digits than its factorization.

621670080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5246 (or 5236 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 621670080 is about 24933.3126559629. The cubic root of 621670080 is about 853.4668465139.

The spelling of 621670080 in words is "six hundred twenty-one million, six hundred seventy thousand, eighty".