3572121620 has 24 divisors (see below), whose sum is σ = 7502733000. Its totient is φ = 1428605312.

The previous prime is 3572121601. The next prime is 3572121643. The reversal of 3572121620 is 261212753.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 668636164 + 2903485456 = 25858^2 + 53884^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147746 + ... + 170214.

It is an arithmetic number, because the mean of its divisors is an integer number (312613875).

Almost surely, 2^3572121620 is an apocalyptic number.

It is an amenable number.

3572121620 is an abundant number, since it is smaller than the sum of its proper divisors (3930611380).

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

3572121620 is a wasteful number, since it uses less digits than its factorization.

3572121620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30427 (or 30425 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 3572121620 is about 59767.2286458056. The cubic root of 3572121620 is about 1528.6524110421.

The spelling of 3572121620 in words is "three billion, five hundred seventy-two million, one hundred twenty-one thousand, six hundred twenty".