72070052 has 6 divisors (see below), whose sum is σ = 126122598. Its totient is φ = 36035024.

The previous prime is 72070051. The next prime is 72070057. The reversal of 72070052 is 25007027.

It can be written as a sum of positive squares in only one way, i.e., 70829056 + 1240996 = 8416^2 + 1114^2 .

It is not an unprimeable number, because it can be changed into a prime (72070051) 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 as a sum of consecutive naturals, namely, 9008753 + ... + 9008760.

It is an arithmetic number, because the mean of its divisors is an integer number (21020433).

Almost surely, 2^72070052 is an apocalyptic number.

It is an amenable number.

72070052 is a deficient number, since it is larger than the sum of its proper divisors (54052546).

72070052 is a wasteful number, since it uses less digits than its factorization.

72070052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18017517 (or 18017515 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 23.

The square root of 72070052 is about 8489.4082243699. The cubic root of 72070052 is about 416.1516412773.

Adding to 72070052 its reverse (25007027), we get a palindrome (97077079).

The spelling of 72070052 in words is "seventy-two million, seventy thousand, fifty-two".