42979870 has 16 divisors (see below), whose sum is σ = 80727840. Its totient is φ = 16444384.

The previous prime is 42979861. The next prime is 42979883. The reversal of 42979870 is 7897924.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a self number, because there is not a number n which added to its sum of digits gives 42979870.

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, 93205 + ... + 93664.

It is an arithmetic number, because the mean of its divisors is an integer number (5045490).

Almost surely, 2^42979870 is an apocalyptic number.

42979870 is a deficient number, since it is larger than the sum of its proper divisors (37747970).

42979870 is a wasteful number, since it uses less digits than its factorization.

42979870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186899.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 42979870 is about 6555.9034465129. The cubic root of 42979870 is about 350.2851282009.

The spelling of 42979870 in words is "forty-two million, nine hundred seventy-nine thousand, eight hundred seventy".