621252480 has 128 divisors (see below), whose sum is σ = 1987286400. Its totient is φ = 165079040.

The previous prime is 621252469. The next prime is 621252509. The reversal of 621252480 is 84252126.

It is a tau number, because it is divible by the number of its divisors (128).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 942391 + ... + 943049.

It is an arithmetic number, because the mean of its divisors is an integer number (15525675).

Almost surely, 2^621252480 is an apocalyptic number.

621252480 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 621252480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (993643200).

621252480 is an abundant number, since it is smaller than the sum of its proper divisors (1366033920).

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

621252480 is a wasteful number, since it uses less digits than its factorization.

621252480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172 (or 1160 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 621252480 is about 24924.9369106524. The cubic root of 621252480 is about 853.2757014029.

The spelling of 621252480 in words is "six hundred twenty-one million, two hundred fifty-two thousand, four hundred eighty".