57878380 has 24 divisors (see below), whose sum is σ = 138908448. Its totient is φ = 19843968.

The previous prime is 57878377. The next prime is 57878383. The reversal of 57878380 is 8387875.

It is an interprime number because it is at equal distance from previous prime (57878377) and next prime (57878383).

It is a self number, because there is not a number n which added to its sum of digits gives 57878380.

It is not an unprimeable number, because it can be changed into a prime (57878383) 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, 206569 + ... + 206848.

It is an arithmetic number, because the mean of its divisors is an integer number (5787852).

Almost surely, 2^57878380 is an apocalyptic number.

It is an amenable number.

57878380 is an abundant number, since it is smaller than the sum of its proper divisors (81030068).

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

57878380 is a wasteful number, since it uses less digits than its factorization.

57878380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413433 (or 413431 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 46.

The square root of 57878380 is about 7607.7841714917. The cubic root of 57878380 is about 386.8169138001.

The spelling of 57878380 in words is "fifty-seven million, eight hundred seventy-eight thousand, three hundred eighty".