3625621840 has 20 divisors (see below), whose sum is σ = 8429570964. Its totient is φ = 1450248704.

The previous prime is 3625621829. The next prime is 3625621843. The reversal of 3625621840 is 481265263.

It can be written as a sum of positive squares in 2 ways, for example, as 2797563664 + 828058176 = 52892^2 + 28776^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 3625621840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3625621843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22660057 + ... + 22660216.

Almost surely, 2^3625621840 is an apocalyptic number.

It is an amenable number.

3625621840 is an abundant number, since it is smaller than the sum of its proper divisors (4803949124).

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

3625621840 is a wasteful number, since it uses less digits than its factorization.

3625621840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45320286 (or 45320280 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 3625621840 is about 60213.1367726346. The cubic root of 3625621840 is about 1536.2462464182.

The spelling of 3625621840 in words is "three billion, six hundred twenty-five million, six hundred twenty-one thousand, eight hundred forty".