72525784 has 8 divisors (see below), whose sum is σ = 135985860. Its totient is φ = 36262888.

The previous prime is 72525779. The next prime is 72525787. The reversal of 72525784 is 48752527.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72525787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4532854 + ... + 4532869.

Almost surely, 2^72525784 is an apocalyptic number.

It is an amenable number.

72525784 is a deficient number, since it is larger than the sum of its proper divisors (63460076).

72525784 is a wasteful number, since it uses less digits than its factorization.

72525784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9065729 (or 9065725 counting only the distinct ones).

The product of its digits is 156800, while the sum is 40.

The square root of 72525784 is about 8516.2071369830. The cubic root of 72525784 is about 417.0269714012.

The spelling of 72525784 in words is "seventy-two million, five hundred twenty-five thousand, seven hundred eighty-four".