57491764 has 24 divisors (see below), whose sum is σ = 110347776. Its totient is φ = 25992000.

The previous prime is 57491761. The next prime is 57491767. The reversal of 57491764 is 46719475.

It is an interprime number because it is at equal distance from previous prime (57491761) and next prime (57491767).

It is a self number, because there is not a number n which added to its sum of digits gives 57491764.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57491761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4984 + ... + 11824.

It is an arithmetic number, because the mean of its divisors is an integer number (4597824).

Almost surely, 2^57491764 is an apocalyptic number.

It is an amenable number.

57491764 is a deficient number, since it is larger than the sum of its proper divisors (52856012).

57491764 is a wasteful number, since it uses less digits than its factorization.

57491764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7047 (or 7045 counting only the distinct ones).

The product of its digits is 211680, while the sum is 43.

The square root of 57491764 is about 7582.3323588458. The cubic root of 57491764 is about 385.9537023767.

The spelling of 57491764 in words is "fifty-seven million, four hundred ninety-one thousand, seven hundred sixty-four".