621428801 has 24 divisors (see below), whose sum is σ = 768559680. Its totient is φ = 490836672.

The previous prime is 621428771. The next prime is 621428803. The reversal of 621428801 is 108824126.

It is a happy number.

It is not a de Polignac number, because 621428801 - 2¹⁴ = 621412417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (621428803) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 180371 + ... + 183783.

It is an arithmetic number, because the mean of its divisors is an integer number (32023320).

Almost surely, 2^621428801 is an apocalyptic number.

It is an amenable number.

621428801 is a deficient number, since it is larger than the sum of its proper divisors (147130879).

621428801 is a wasteful number, since it uses less digits than its factorization.

621428801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3513 (or 3476 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 621428801 is about 24928.4736997675. The cubic root of 621428801 is about 853.3564180190.

The spelling of 621428801 in words is "six hundred twenty-one million, four hundred twenty-eight thousand, eight hundred one".