56681742 has 16 divisors (see below), whose sum is σ = 122083920. Its totient is φ = 17440512.

The previous prime is 56681741. The next prime is 56681759. The reversal of 56681742 is 24718665.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 56681742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56681741) 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, 363267 + ... + 363422.

It is an arithmetic number, because the mean of its divisors is an integer number (7630245).

Almost surely, 2^56681742 is an apocalyptic number.

56681742 is an abundant number, since it is smaller than the sum of its proper divisors (65402178).

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

56681742 is a wasteful number, since it uses less digits than its factorization.

56681742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726707.

The product of its digits is 80640, while the sum is 39.

The square root of 56681742 is about 7528.7277809734. The cubic root of 56681742 is about 384.1325090651.

The spelling of 56681742 in words is "fifty-six million, six hundred eighty-one thousand, seven hundred forty-two".