72894938 has 4 divisors (see below), whose sum is σ = 109342410. Its totient is φ = 36447468.

The previous prime is 72894937. The next prime is 72894967. The reversal of 72894938 is 83949827.

It is a happy number.

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., 38402809 + 34492129 = 6197^2 + 5873^2 .

It is not an unprimeable number, because it can be changed into a prime (72894931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18223733 + ... + 18223736.

Almost surely, 2^72894938 is an apocalyptic number.

72894938 is a deficient number, since it is larger than the sum of its proper divisors (36447472).

72894938 is a wasteful number, since it uses less digits than its factorization.

72894938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36447471.

The product of its digits is 870912, while the sum is 50.

The square root of 72894938 is about 8537.8532430582. The cubic root of 72894938 is about 417.7333257797.

The spelling of 72894938 in words is "seventy-two million, eight hundred ninety-four thousand, nine hundred thirty-eight".