72404267 has 4 divisors (see below), whose sum is σ = 77973840. Its totient is φ = 66834696.

The previous prime is 72404263. The next prime is 72404279. The reversal of 72404267 is 76240427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76240427 = 17 ⋅4484731.

It is a cyclic number.

It is not a de Polignac number, because 72404267 - 2² = 72404263 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72404261) 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, 2784767 + ... + 2784792.

It is an arithmetic number, because the mean of its divisors is an integer number (19493460).

Almost surely, 2^72404267 is an apocalyptic number.

72404267 is a deficient number, since it is larger than the sum of its proper divisors (5569573).

72404267 is a wasteful number, since it uses less digits than its factorization.

72404267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5569572.

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 72404267 is about 8509.0696906301. The cubic root of 72404267 is about 416.7939315426.

The spelling of 72404267 in words is "seventy-two million, four hundred four thousand, two hundred sixty-seven".