42978716 has 18 divisors (see below), whose sum is σ = 82672800. Its totient is φ = 19535560.

The previous prime is 42978659. The next prime is 42978721. The reversal of 42978716 is 61787924.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43916 + ... + 44883.

Almost surely, 2^42978716 is an apocalyptic number.

It is an amenable number.

42978716 is a deficient number, since it is larger than the sum of its proper divisors (39694084).

42978716 is a wasteful number, since it uses less digits than its factorization.

42978716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88825 (or 88812 counting only the distinct ones).

The product of its digits is 169344, while the sum is 44.

The square root of 42978716 is about 6555.8154336436. The cubic root of 42978716 is about 350.2819931468.

The spelling of 42978716 in words is "forty-two million, nine hundred seventy-eight thousand, seven hundred sixteen".