72767258 has 4 divisors (see below), whose sum is σ = 109150890. Its totient is φ = 36383628.

The previous prime is 72767231. The next prime is 72767267. The reversal of 72767258 is 85276727.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 51079609 + 21687649 = 7147^2 + 4657^2 .

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

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, 18191813 + ... + 18191816.

Almost surely, 2^72767258 is an apocalyptic number.

72767258 is a deficient number, since it is larger than the sum of its proper divisors (36383632).

72767258 is a wasteful number, since it uses less digits than its factorization.

72767258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36383631.

The product of its digits is 329280, while the sum is 44.

The square root of 72767258 is about 8530.3726765013. The cubic root of 72767258 is about 417.4892879750.

The spelling of 72767258 in words is "seventy-two million, seven hundred sixty-seven thousand, two hundred fifty-eight".