57381402 has 16 divisors (see below), whose sum is σ = 123590880. Its totient is φ = 17655792.

The previous prime is 57381397. The next prime is 57381421. The reversal of 57381402 is 20418375.

57381402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 57381402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367752 + ... + 367907.

It is an arithmetic number, because the mean of its divisors is an integer number (7724430).

Almost surely, 2^57381402 is an apocalyptic number.

57381402 is an abundant number, since it is smaller than the sum of its proper divisors (66209478).

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

57381402 is a wasteful number, since it uses less digits than its factorization.

57381402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735677.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 57381402 is about 7575.0512869551. The cubic root of 57381402 is about 385.7065834637.

Adding to 57381402 its reverse (20418375), we get a palindrome (77799777).

It can be divided in two parts, 5738 and 1402, that added together give a triangular number (7140 = T₁₁₉).

The spelling of 57381402 in words is "fifty-seven million, three hundred eighty-one thousand, four hundred two".