72261658 has 16 divisors (see below), whose sum is σ = 124127424. Its totient is φ = 30906720.

The previous prime is 72261643. The next prime is 72261661. The reversal of 72261658 is 85616227.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2341 + ... + 12247.

It is an arithmetic number, because the mean of its divisors is an integer number (7757964).

Almost surely, 2^72261658 is an apocalyptic number.

72261658 is a deficient number, since it is larger than the sum of its proper divisors (51865766).

72261658 is a wasteful number, since it uses less digits than its factorization.

72261658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10437.

The product of its digits is 40320, while the sum is 37.

The square root of 72261658 is about 8500.6857370450. The cubic root of 72261658 is about 416.5201095943.

The spelling of 72261658 in words is "seventy-two million, two hundred sixty-one thousand, six hundred fifty-eight".