621090402 has 16 divisors (see below), whose sum is σ = 1260721632. Its totient is φ = 203940000.

The previous prime is 621090401. The next prime is 621090433. The reversal of 621090402 is 204090126.

It is not an unprimeable number, because it can be changed into a prime (621090401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 772099 + ... + 772902.

It is an arithmetic number, because the mean of its divisors is an integer number (78795102).

Almost surely, 2^621090402 is an apocalyptic number.

621090402 is an abundant number, since it is smaller than the sum of its proper divisors (639631230).

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

621090402 is a wasteful number, since it uses less digits than its factorization.

621090402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545073.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 621090402 is about 24921.6853763946. The cubic root of 621090402 is about 853.2014915059.

The spelling of 621090402 in words is "six hundred twenty-one million, ninety thousand, four hundred two".