57820399 has 8 divisors (see below), whose sum is σ = 71163680. Its totient is φ = 45747936.

The previous prime is 57820393. The next prime is 57820409. The reversal of 57820399 is 99302875.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 57820399 - 2³ = 57820391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57820391) 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, 317604 + ... + 317785.

It is an arithmetic number, because the mean of its divisors is an integer number (8895460).

Almost surely, 2^57820399 is an apocalyptic number.

57820399 is a deficient number, since it is larger than the sum of its proper divisors (13343281).

57820399 is a wasteful number, since it uses less digits than its factorization.

57820399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635409.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 57820399 is about 7603.9725801715. The cubic root of 57820399 is about 386.6877030602.

The spelling of 57820399 in words is "fifty-seven million, eight hundred twenty thousand, three hundred ninety-nine".