72158794 has 4 divisors (see below), whose sum is σ = 108238194. Its totient is φ = 36079396.

The previous prime is 72158759. The next prime is 72158803. The reversal of 72158794 is 49785127.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 62204769 + 9954025 = 7887^2 + 3155^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 72158794.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18039697 + ... + 18039700.

Almost surely, 2^72158794 is an apocalyptic number.

72158794 is a deficient number, since it is larger than the sum of its proper divisors (36079400).

72158794 is a wasteful number, since it uses less digits than its factorization.

72158794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36079399.

The product of its digits is 141120, while the sum is 43.

The square root of 72158794 is about 8494.6332469389. The cubic root of 72158794 is about 416.3223778526.

The spelling of 72158794 in words is "seventy-two million, one hundred fifty-eight thousand, seven hundred ninety-four".