57661740 has 48 divisors (see below), whose sum is σ = 179393760. Its totient is φ = 15376320.

The previous prime is 57661717. The next prime is 57661757. The reversal of 57661740 is 4716675.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 57661695 and 57661704.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52851 + ... + 53930.

It is an arithmetic number, because the mean of its divisors is an integer number (3737370).

Almost surely, 2^57661740 is an apocalyptic number.

It is an amenable number.

57661740 is an abundant number, since it is smaller than the sum of its proper divisors (121732020).

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

57661740 is a wasteful number, since it uses less digits than its factorization.

57661740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106799 (or 106791 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 57661740 is about 7593.5327746708. The cubic root of 57661740 is about 386.3336890954. Note that the first 3 decimals are identical.

The spelling of 57661740 in words is "fifty-seven million, six hundred sixty-one thousand, seven hundred forty".