72017506 has 24 divisors (see below), whose sum is σ = 120274560. Its totient is φ = 32312280.

The previous prime is 72017459. The next prime is 72017521. The reversal of 72017506 is 60571027.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17235 + ... + 21001.

It is an arithmetic number, because the mean of its divisors is an integer number (5011440).

Almost surely, 2^72017506 is an apocalyptic number.

72017506 is a deficient number, since it is larger than the sum of its proper divisors (48257054).

72017506 is a wasteful number, since it uses less digits than its factorization.

72017506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3870 (or 3859 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 72017506 is about 8486.3128624863. The cubic root of 72017506 is about 416.0504784961.

The spelling of 72017506 in words is "seventy-two million, seventeen thousand, five hundred six".