42744628 has 6 divisors (see below), whose sum is σ = 74803106. Its totient is φ = 21372312.

The previous prime is 42744607. The next prime is 42744641. The reversal of 42744628 is 82644724.

It can be written as a sum of positive squares in only one way, i.e., 35497764 + 7246864 = 5958^2 + 2692^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5343075 + ... + 5343082.

Almost surely, 2^42744628 is an apocalyptic number.

It is an amenable number.

42744628 is a deficient number, since it is larger than the sum of its proper divisors (32058478).

42744628 is a wasteful number, since it uses less digits than its factorization.

42744628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10686161 (or 10686159 counting only the distinct ones).

The product of its digits is 86016, while the sum is 37.

The square root of 42744628 is about 6537.9375952972. The cubic root of 42744628 is about 349.6448860778.

The spelling of 42744628 in words is "forty-two million, seven hundred forty-four thousand, six hundred twenty-eight".