621674544 has 80 divisors (see below), whose sum is σ = 1683820800. Its totient is φ = 197269248.

The previous prime is 621674533. The next prime is 621674587. The reversal of 621674544 is 445476126.

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, 251587 + ... + 254045.

It is an arithmetic number, because the mean of its divisors is an integer number (21047760).

Almost surely, 2^621674544 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 621674544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (841910400).

621674544 is an abundant number, since it is smaller than the sum of its proper divisors (1062146256).

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

621674544 is a wasteful number, since it uses less digits than its factorization.

621674544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2722 (or 2716 counting only the distinct ones).

The product of its digits is 161280, while the sum is 39.

The square root of 621674544 is about 24933.4021745930. The cubic root of 621674544 is about 853.4688893267.

The spelling of 621674544 in words is "six hundred twenty-one million, six hundred seventy-four thousand, five hundred forty-four".