72652420 has 12 divisors (see below), whose sum is σ = 152570124. Its totient is φ = 29060960.

The previous prime is 72652417. The next prime is 72652427. The reversal of 72652420 is 2425627.

It can be written as a sum of positive squares in 2 ways, for example, as 48916036 + 23736384 = 6994^2 + 4872^2 .

It is not an unprimeable number, because it can be changed into a prime (72652427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1816291 + ... + 1816330.

It is an arithmetic number, because the mean of its divisors is an integer number (12714177).

Almost surely, 2^72652420 is an apocalyptic number.

It is an amenable number.

72652420 is an abundant number, since it is smaller than the sum of its proper divisors (79917704).

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

72652420 is a wasteful number, since it uses less digits than its factorization.

72652420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3632630 (or 3632628 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 72652420 is about 8523.6388942751. The cubic root of 72652420 is about 417.2695514290.

The spelling of 72652420 in words is "seventy-two million, six hundred fifty-two thousand, four hundred twenty".