72857930 has 16 divisors (see below), whose sum is σ = 131872104. Its totient is φ = 28981440.

The previous prime is 72857929. The next prime is 72857933. The reversal of 72857930 is 3975827.

It can be written as a sum of positive squares in 4 ways, for example, as 49519369 + 23338561 = 7037^2 + 4831^2 .

It is not an unprimeable number, because it can be changed into a prime (72857933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18317 + ... + 21936.

Almost surely, 2^72857930 is an apocalyptic number.

72857930 is a deficient number, since it is larger than the sum of its proper divisors (59014174).

72857930 is a wasteful number, since it uses less digits than its factorization.

72857930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40441.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 72857930 is about 8535.6856783741. The cubic root of 72857930 is about 417.6626208616.

The spelling of 72857930 in words is "seventy-two million, eight hundred fifty-seven thousand, nine hundred thirty".