56621742 has 8 divisors (see below), whose sum is σ = 113243496. Its totient is φ = 18873912.

The previous prime is 56621693. The next prime is 56621753. The reversal of 56621742 is 24712665.

It is a sphenic number, since it is the product of 3 distinct primes.

56621742 is an admirable number.

It is a super-2 number, since 2×56621742² = 6412043334229128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 4718473 + ... + 4718484.

It is an arithmetic number, because the mean of its divisors is an integer number (14155437).

Almost surely, 2^56621742 is an apocalyptic number.

56621742 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

56621742 is a wasteful number, since it uses less digits than its factorization.

56621742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9436962.

The product of its digits is 20160, while the sum is 33.

The square root of 56621742 is about 7524.7419889322. The cubic root of 56621742 is about 383.9969210908.

The spelling of 56621742 in words is "fifty-six million, six hundred twenty-one thousand, seven hundred forty-two".