56271640 has 32 divisors (see below), whose sum is σ = 127925280. Its totient is φ = 22275072.

The previous prime is 56271623. The next prime is 56271641. The reversal of 56271640 is 4617265.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56271641) 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, 3372 + ... + 11131.

It is an arithmetic number, because the mean of its divisors is an integer number (3997665).

Almost surely, 2^56271640 is an apocalyptic number.

It is an amenable number.

56271640 is an abundant number, since it is smaller than the sum of its proper divisors (71653640).

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

56271640 is a wasteful number, since it uses less digits than its factorization.

56271640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14611 (or 14607 counting only the distinct ones).

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

The square root of 56271640 is about 7501.4425279409. The cubic root of 56271640 is about 383.2038445228.

The spelling of 56271640 in words is "fifty-six million, two hundred seventy-one thousand, six hundred forty".