72572194 has 4 divisors (see below), whose sum is σ = 108858294. Its totient is φ = 36286096.

The previous prime is 72572177. The next prime is 72572197. The reversal of 72572194 is 49127527.

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., 72335025 + 237169 = 8505^2 + 487^2 .

It is not an unprimeable number, because it can be changed into a prime (72572197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18143047 + ... + 18143050.

Almost surely, 2^72572194 is an apocalyptic number.

72572194 is a deficient number, since it is larger than the sum of its proper divisors (36286100).

72572194 is a wasteful number, since it uses less digits than its factorization.

72572194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36286099.

The product of its digits is 35280, while the sum is 37.

The square root of 72572194 is about 8518.9315057700. The cubic root of 72572194 is about 417.1159057259.

The spelling of 72572194 in words is "seventy-two million, five hundred seventy-two thousand, one hundred ninety-four".