72857478 has 24 divisors (see below), whose sum is σ = 154794312. Its totient is φ = 22856704.

The previous prime is 72857467. The next prime is 72857489. The reversal of 72857478 is 87475827.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72857467) and next prime (72857489).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19275 + ... + 22742.

It is an arithmetic number, because the mean of its divisors is an integer number (6449763).

Almost surely, 2^72857478 is an apocalyptic number.

72857478 is an abundant number, since it is smaller than the sum of its proper divisors (81936834).

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

72857478 is a wasteful number, since it uses less digits than its factorization.

72857478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42056 (or 42039 counting only the distinct ones).

The product of its digits is 878080, while the sum is 48.

The square root of 72857478 is about 8535.6592012568. The cubic root of 72857478 is about 417.6617571537.

The spelling of 72857478 in words is "seventy-two million, eight hundred fifty-seven thousand, four hundred seventy-eight".