57722140 has 96 divisors (see below), whose sum is σ = 149022720. Its totient is φ = 18330624.

The previous prime is 57722129. The next prime is 57722143. The reversal of 57722140 is 4122775.

57722140 is a nontrivial binomial coefficient, being equal to C(10745, 2).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 57722099 and 57722108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57722143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 187867 + ... + 188173.

It is an arithmetic number, because the mean of its divisors is an integer number (1552320).

Almost surely, 2^57722140 is an apocalyptic number.

57722140 is the 10744-th triangular number.

57722140 is the 3582-nd centered nonagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57722140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74511360).

57722140 is an abundant number, since it is smaller than the sum of its proper divisors (91300580).

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

57722140 is a wasteful number, since it uses less digits than its factorization.

57722140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419 (or 417 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 57722140 is about 7597.5088022325. The cubic root of 57722140 is about 386.4685353673.

The spelling of 57722140 in words is "fifty-seven million, seven hundred twenty-two thousand, one hundred forty".