56733558 has 16 divisors (see below), whose sum is σ = 129676800. Its totient is φ = 16209576.

The previous prime is 56733557. The next prime is 56733623. The reversal of 56733558 is 85533765.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 1350799 = 56733558 / (5 + 6 + 7 + 3 + 3 + 5 + 5 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56733557) 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, 675358 + ... + 675441.

It is an arithmetic number, because the mean of its divisors is an integer number (8104800).

Almost surely, 2^56733558 is an apocalyptic number.

56733558 is an abundant number, since it is smaller than the sum of its proper divisors (72943242).

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

56733558 is a wasteful number, since it uses less digits than its factorization.

56733558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350811.

The product of its digits is 378000, while the sum is 42.

The square root of 56733558 is about 7532.1682137350. The cubic root of 56733558 is about 384.2495258638.

It can be divided in two parts, 56733 and 558, that added together give a triangular number (57291 = T₃₃₈).

The spelling of 56733558 in words is "fifty-six million, seven hundred thirty-three thousand, five hundred fifty-eight".