57040236 has 144 divisors (see below), whose sum is σ = 171793440. Its totient is φ = 15759360.

The previous prime is 57040201. The next prime is 57040289. The reversal of 57040236 is 63204075.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 248970 + ... + 249198.

It is an arithmetic number, because the mean of its divisors is an integer number (1193010).

Almost surely, 2^57040236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57040236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85896720).

57040236 is an abundant number, since it is smaller than the sum of its proper divisors (114753204).

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

57040236 is a wasteful number, since it uses less digits than its factorization.

57040236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 57040236 is about 7552.4986593842. The cubic root of 57040236 is about 384.9406463851.

The spelling of 57040236 in words is "fifty-seven million, forty thousand, two hundred thirty-six".