42057784 has 32 divisors (see below), whose sum is σ = 81544320. Its totient is φ = 20323296.

The previous prime is 42057761. The next prime is 42057791. The reversal of 42057784 is 48775024.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34839 + ... + 36025.

It is an arithmetic number, because the mean of its divisors is an integer number (2548260).

Almost surely, 2^42057784 is an apocalyptic number.

It is an amenable number.

42057784 is a deficient number, since it is larger than the sum of its proper divisors (39486536).

42057784 is a wasteful number, since it uses less digits than its factorization.

42057784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339 (or 1335 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 37.

The square root of 42057784 is about 6485.1972984636. The cubic root of 42057784 is about 347.7620031232.

The spelling of 42057784 in words is "forty-two million, fifty-seven thousand, seven hundred eighty-four".