78857933 has 32 divisors (see below), whose sum is σ = 101517312. Its totient is φ = 59486400.

The previous prime is 78857927. The next prime is 78857953. The reversal of 78857933 is 33975887.

It is a cyclic number.

It is not a de Polignac number, because 78857933 - 2¹⁴ = 78841549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78857953) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 483710 + ... + 483872.

It is an arithmetic number, because the mean of its divisors is an integer number (3172416).

Almost surely, 2^78857933 is an apocalyptic number.

It is an amenable number.

78857933 is a deficient number, since it is larger than the sum of its proper divisors (22659379).

78857933 is a wasteful number, since it uses less digits than its factorization.

78857933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345.

The product of its digits is 1270080, while the sum is 50.

The square root of 78857933 is about 8880.1989279520. The cubic root of 78857933 is about 428.8266787353.

The spelling of 78857933 in words is "seventy-eight million, eight hundred fifty-seven thousand, nine hundred thirty-three".