621438048 has 192 divisors, whose sum is σ = 2260016640. Its totient is φ = 161395200.

The previous prime is 621438031. The next prime is 621438061. The reversal of 621438048 is 840834126.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61858 + ... + 71198.

It is an arithmetic number, because the mean of its divisors is an integer number (11770920).

Almost surely, 2^621438048 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 621438048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1130008320).

621438048 is an abundant number, since it is smaller than the sum of its proper divisors (1638578592).

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

621438048 is a wasteful number, since it uses less digits than its factorization.

621438048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9378 (or 9364 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 621438048 is about 24928.6591697187. The cubic root of 621438048 is about 853.3606507097.

The spelling of 621438048 in words is "six hundred twenty-one million, four hundred thirty-eight thousand, forty-eight".