57726438 has 96 divisors (see below), whose sum is σ = 149436672. Its totient is φ = 14541120.

The previous prime is 57726413. The next prime is 57726439. The reversal of 57726438 is 83462775.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 57726438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57726439) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 187881 + ... + 188187.

It is an arithmetic number, because the mean of its divisors is an integer number (1556632).

Almost surely, 2^57726438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57726438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74718336).

57726438 is an abundant number, since it is smaller than the sum of its proper divisors (91710234).

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

57726438 is a wasteful number, since it uses less digits than its factorization.

57726438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378 (or 367 counting only the distinct ones).

The product of its digits is 282240, while the sum is 42.

The square root of 57726438 is about 7597.7916528423. The cubic root of 57726438 is about 386.4781272993.

The spelling of 57726438 in words is "fifty-seven million, seven hundred twenty-six thousand, four hundred thirty-eight".