72194644 has 12 divisors (see below), whose sum is σ = 128226784. Its totient is φ = 35558424.

The previous prime is 72194627. The next prime is 72194663. The reversal of 72194644 is 44649127.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134424 + ... + 134959.

Almost surely, 2^72194644 is an apocalyptic number.

It is an amenable number.

72194644 is a deficient number, since it is larger than the sum of its proper divisors (56032140).

72194644 is a wasteful number, since it uses less digits than its factorization.

72194644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269454 (or 269452 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 72194644 is about 8496.7431407569. The cubic root of 72194644 is about 416.3913123298.

The spelling of 72194644 in words is "seventy-two million, one hundred ninety-four thousand, six hundred forty-four".