57399426 has 72 divisors (see below), whose sum is σ = 146220672. Its totient is φ = 15940800.

The previous prime is 57399409. The next prime is 57399427. The reversal of 57399426 is 62499375.

It is a happy number.

57399426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Its product of digits (408240) is a multiple of the sum of its prime divisors (324).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57399427) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 211671 + ... + 211941.

Almost surely, 2^57399426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57399426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73110336).

57399426 is an abundant number, since it is smaller than the sum of its proper divisors (88821246).

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

57399426 is a wasteful number, since it uses less digits than its factorization.

57399426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368 (or 324 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 57399426 is about 7576.2408884618. The cubic root of 57399426 is about 385.7469638393.

It can be divided in two parts, 573 and 99426, that added together give a palindrome (99999).

The spelling of 57399426 in words is "fifty-seven million, three hundred ninety-nine thousand, four hundred twenty-six".