72572445 has 48 divisors (see below), whose sum is σ = 137988864. Its totient is φ = 34992000.

The previous prime is 72572443. The next prime is 72572449. The reversal of 72572445 is 54427527.

It is a happy number.

It is not a de Polignac number, because 72572445 - 2¹ = 72572443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72572441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 133875 + ... + 134415.

It is an arithmetic number, because the mean of its divisors is an integer number (2874768).

Almost surely, 2^72572445 is an apocalyptic number.

It is an amenable number.

72572445 is a deficient number, since it is larger than the sum of its proper divisors (65416419).

72572445 is a wasteful number, since it uses less digits than its factorization.

72572445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 834 (or 831 counting only the distinct ones).

The product of its digits is 78400, while the sum is 36.

The square root of 72572445 is about 8518.9462376517. The cubic root of 72572445 is about 417.1163866079.

The spelling of 72572445 in words is "seventy-two million, five hundred seventy-two thousand, four hundred forty-five".