72570386 has 48 divisors (see below), whose sum is σ = 133648704. Its totient is φ = 28941408.

The previous prime is 72570361. The next prime is 72570389. The reversal of 72570386 is 68307527.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (72570389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 419396 + ... + 419568.

It is an arithmetic number, because the mean of its divisors is an integer number (2784348).

Almost surely, 2^72570386 is an apocalyptic number.

72570386 is a deficient number, since it is larger than the sum of its proper divisors (61078318).

72570386 is a wasteful number, since it uses less digits than its factorization.

72570386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 72570386 is about 8518.8253885145. The cubic root of 72570386 is about 417.1124418106.

The spelling of 72570386 in words is "seventy-two million, five hundred seventy thousand, three hundred eighty-six".