621467880 has 128 divisors (see below), whose sum is σ = 2064545280. Its totient is φ = 148389120.

The previous prime is 621467867. The next prime is 621467893. The reversal of 621467880 is 88764126.

It is an interprime number because it is at equal distance from previous prime (621467867) and next prime (621467893).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84927 + ... + 91953.

It is an arithmetic number, because the mean of its divisors is an integer number (16129260).

Almost surely, 2^621467880 is an apocalyptic number.

621467880 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 621467880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1032272640).

621467880 is an abundant number, since it is smaller than the sum of its proper divisors (1443077400).

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

621467880 is a wasteful number, since it uses less digits than its factorization.

621467880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7119 (or 7115 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 621467880 is about 24929.2575100022. The cubic root of 621467880 is about 853.3743056228.

The spelling of 621467880 in words is "six hundred twenty-one million, four hundred sixty-seven thousand, eight hundred eighty".