72572040 has 48 divisors (see below), whose sum is σ = 235860300. Its totient is φ = 19352448.

The previous prime is 72572029. The next prime is 72572041. The reversal of 72572040 is 4027527.

It can be written as a sum of positive squares in 2 ways, for example, as 71876484 + 695556 = 8478^2 + 834^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72571995 and 72572013.

It is not an unprimeable number, because it can be changed into a prime (72572041) 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 11 ways as a sum of consecutive naturals, for example, 100435 + ... + 101154.

Almost surely, 2^72572040 is an apocalyptic number.

It is an amenable number.

72572040 is an abundant number, since it is smaller than the sum of its proper divisors (163288260).

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

72572040 is a wasteful number, since it uses less digits than its factorization.

72572040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201606 (or 201599 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 72572040 is about 8518.9224670729. The cubic root of 72572040 is about 417.1156106823.

Adding to 72572040 its reverse (4027527), we get a palindrome (76599567).

The spelling of 72572040 in words is "seventy-two million, five hundred seventy-two thousand, forty".