72270570 has 32 divisors (see below), whose sum is σ = 183653568. Its totient is φ = 18138368.

The previous prime is 72270521. The next prime is 72270593. The reversal of 72270570 is 7507227.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 70344 + ... + 71363.

It is an arithmetic number, because the mean of its divisors is an integer number (5739174).

Almost surely, 2^72270570 is an apocalyptic number.

72270570 is an abundant number, since it is smaller than the sum of its proper divisors (111382998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72270570 is a wasteful number, since it uses less digits than its factorization.

72270570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141734.

The product of its (nonzero) digits is 6860, while the sum is 30.

The square root of 72270570 is about 8501.2099138887. The cubic root of 72270570 is about 416.5372319739.

Adding to 72270570 its reverse (7507227), we get a palindrome (79777797).

The spelling of 72270570 in words is "seventy-two million, two hundred seventy thousand, five hundred seventy".