57661420 has 12 divisors (see below), whose sum is σ = 121089024. Its totient is φ = 23064560.

The previous prime is 57661397. The next prime is 57661421. The reversal of 57661420 is 2416675.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (57661421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1441516 + ... + 1441555.

It is an arithmetic number, because the mean of its divisors is an integer number (10090752).

Almost surely, 2^57661420 is an apocalyptic number.

It is an amenable number.

57661420 is an abundant number, since it is smaller than the sum of its proper divisors (63427604).

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

57661420 is a wasteful number, since it uses less digits than its factorization.

57661420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2883080 (or 2883078 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 57661420 is about 7593.5117040800. The cubic root of 57661420 is about 386.3329744274.

It can be divided in two parts, 57661 and 420, that added together give a square (58081 = 241²).

The spelling of 57661420 in words is "fifty-seven million, six hundred sixty-one thousand, four hundred twenty".