72842242 has 36 divisors (see below), whose sum is σ = 125768790. Its totient is φ = 31614880.

The previous prime is 72842239. The next prime is 72842251. The reversal of 72842242 is 24224827.

It can be written as a sum of positive squares in only one way, i.e., 69705801 + 3136441 = 8349^2 + 1771^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 127734 + ... + 128302.

Almost surely, 2^72842242 is an apocalyptic number.

72842242 is a deficient number, since it is larger than the sum of its proper divisors (52926548).

72842242 is a wasteful number, since it uses less digits than its factorization.

72842242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639 (or 605 counting only the distinct ones).

The product of its digits is 14336, while the sum is 31.

The square root of 72842242 is about 8534.7666634771. The cubic root of 72842242 is about 417.6326412307.

The spelling of 72842242 in words is "seventy-two million, eight hundred forty-two thousand, two hundred forty-two".