621653032 has 128 divisors (see below), whose sum is σ = 1578528000. Its totient is φ = 221644800.

The previous prime is 621653023. The next prime is 621653041. The reversal of 621653032 is 230356126.

It is an interprime number because it is at equal distance from previous prime (621653023) and next prime (621653041).

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 1192932 + ... + 1193452.

It is an arithmetic number, because the mean of its divisors is an integer number (12332250).

Almost surely, 2^621653032 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 621653032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (789264000).

621653032 is an abundant number, since it is smaller than the sum of its proper divisors (956874968).

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

621653032 is a wasteful number, since it uses less digits than its factorization.

621653032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707 (or 703 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 621653032 is about 24932.9707816778. The cubic root of 621653032 is about 853.4590449289.

The spelling of 621653032 in words is "six hundred twenty-one million, six hundred fifty-three thousand, thirty-two".