72472690 has 8 divisors (see below), whose sum is σ = 130450860. Its totient is φ = 28989072.

The previous prime is 72472681. The next prime is 72472691. The reversal of 72472690 is 9627427.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 72471169 + 1521 = 8513^2 + 39^2 .

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

It is a super-2 number, since 2×72472690² = 10504581591672200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72472691) 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, 3623625 + ... + 3623644.

Almost surely, 2^72472690 is an apocalyptic number.

72472690 is a deficient number, since it is larger than the sum of its proper divisors (57978170).

72472690 is a wasteful number, since it uses less digits than its factorization.

72472690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7247276.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 72472690 is about 8513.0893334911. The cubic root of 72472690 is about 416.9251821520.

The spelling of 72472690 in words is "seventy-two million, four hundred seventy-two thousand, six hundred ninety".