72396442 has 4 divisors (see below), whose sum is σ = 108594666. Its totient is φ = 36198220.

The previous prime is 72396437. The next prime is 72396451. The reversal of 72396442 is 24469327.

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., 43441281 + 28955161 = 6591^2 + 5381^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18099109 + ... + 18099112.

Almost surely, 2^72396442 is an apocalyptic number.

72396442 is a deficient number, since it is larger than the sum of its proper divisors (36198224).

72396442 is a wasteful number, since it uses less digits than its factorization.

72396442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36198223.

The product of its digits is 72576, while the sum is 37.

The square root of 72396442 is about 8508.6098747093. The cubic root of 72396442 is about 416.7789161752.

The spelling of 72396442 in words is "seventy-two million, three hundred ninety-six thousand, four hundred forty-two".