42780982 has 4 divisors (see below), whose sum is σ = 64171476. Its totient is φ = 21390490.

The previous prime is 42780973. The next prime is 42781007. The reversal of 42780982 is 28908724.

It is a semiprime because it is the product of two primes.

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, 10695244 + ... + 10695247.

It is an arithmetic number, because the mean of its divisors is an integer number (16042869).

Almost surely, 2^42780982 is an apocalyptic number.

42780982 is a deficient number, since it is larger than the sum of its proper divisors (21390494).

42780982 is a wasteful number, since it uses less digits than its factorization.

42780982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21390493.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 42780982 is about 6540.7172389578. The cubic root of 42780982 is about 349.7439814803.

The spelling of 42780982 in words is "forty-two million, seven hundred eighty thousand, nine hundred eighty-two".