72857358 has 72 divisors (see below), whose sum is σ = 184957968. Its totient is φ = 20300544.

The previous prime is 72857357. The next prime is 72857377. The reversal of 72857358 is 85375827.

72857358 is a `hidden beast` number, since 7 + 28 + 573 + 58 = 666.

It is a super-2 number, since 2×72857358² = 10616389229480328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72857357) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 818578 + ... + 818666.

Almost surely, 2^72857358 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72857358, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92478984).

72857358 is an abundant number, since it is smaller than the sum of its proper divisors (112100610).

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

72857358 is a wasteful number, since it uses less digits than its factorization.

72857358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 174 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The square root of 72857358 is about 8535.6521719198. The cubic root of 72857358 is about 417.6615278502.

The spelling of 72857358 in words is "seventy-two million, eight hundred fifty-seven thousand, three hundred fifty-eight".