72917642 has 16 divisors (see below), whose sum is σ = 129034752. Its totient is φ = 30242160.

The previous prime is 72917623. The next prime is 72917653. The reversal of 72917642 is 24671927.

It is a junction number, because it is equal to n+sod(n) for n = 72917596 and 72917605.

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, 83573 + ... + 84440.

It is an arithmetic number, because the mean of its divisors is an integer number (8064672).

Almost surely, 2^72917642 is an apocalyptic number.

72917642 is a deficient number, since it is larger than the sum of its proper divisors (56117110).

72917642 is a wasteful number, since it uses less digits than its factorization.

72917642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168053.

The product of its digits is 42336, while the sum is 38.

The square root of 72917642 is about 8539.1827477810. The cubic root of 72917642 is about 417.7766906241.

The spelling of 72917642 in words is "seventy-two million, nine hundred seventeen thousand, six hundred forty-two".