72506930 has 8 divisors (see below), whose sum is σ = 130512492. Its totient is φ = 29002768.

The previous prime is 72506927. The next prime is 72506933. The reversal of 72506930 is 3960527.

It is an interprime number because it is at equal distance from previous prime (72506927) and next prime (72506933).

It can be written as a sum of positive squares in 2 ways, for example, as 70946929 + 1560001 = 8423^2 + 1249^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (72506933) 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, 3625337 + ... + 3625356.

Almost surely, 2^72506930 is an apocalyptic number.

72506930 is a deficient number, since it is larger than the sum of its proper divisors (58005562).

72506930 is a wasteful number, since it uses less digits than its factorization.

72506930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7250700.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 72506930 is about 8515.1001168512. The cubic root of 72506930 is about 416.9908311142.

The spelling of 72506930 in words is "seventy-two million, five hundred six thousand, nine hundred thirty".