42745444 has 27 divisors (see below), whose sum is σ = 87204243.
Its totient is φ = 18280248.
The previous prime is 42745433. The next prime is 42745453. The reversal of 42745444 is 44454724.
The square root of 42745444 is 6538.
It is a perfect power (a square), and thus also a powerful number.
It is an unprimeable number.
It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 91299 + ... + 91765.
Almost surely, 242745444 is an apocalyptic number.
42745444 is the 6538-th square number.
It is an amenable number.
42745444 is an abundant number, since it is smaller than the sum of its proper divisors (44458799).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
42745444 is an equidigital number, since it uses as much as digits as its factorization.
42745444 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 952 (or 476 counting only the distinct ones).
The product of its digits is 71680, while the sum is 34.
The cubic root of 42745444 is about 349.6471109844.
The spelling of 42745444 in words is "forty-two million, seven hundred forty-five thousand, four hundred forty-four".