72800242 has 4 divisors (see below), whose sum is σ = 109200366. Its totient is φ = 36400120.

The previous prime is 72800219. The next prime is 72800243. The reversal of 72800242 is 24200827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24200827 = 7 ⋅3457261.

It can be written as a sum of positive squares in only one way, i.e., 51279921 + 21520321 = 7161^2 + 4639^2 .

It is not an unprimeable number, because it can be changed into a prime (72800243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18200059 + ... + 18200062.

Almost surely, 2^72800242 is an apocalyptic number.

72800242 is a deficient number, since it is larger than the sum of its proper divisors (36400124).

72800242 is a wasteful number, since it uses less digits than its factorization.

72800242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36400123.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 72800242 is about 8532.3057844876. The cubic root of 72800242 is about 417.5523584041.

The spelling of 72800242 in words is "seventy-two million, eight hundred thousand, two hundred forty-two".