42978705 has 64 divisors (see below), whose sum is σ = 86704128. Its totient is φ = 17660160.

The previous prime is 42978659. The next prime is 42978721. The reversal of 42978705 is 50787924.

It is not a de Polignac number, because 42978705 - 2⁷ = 42978577 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 146539 + ... + 146831.

It is an arithmetic number, because the mean of its divisors is an integer number (1354752).

Almost surely, 2^42978705 is an apocalyptic number.

It is an amenable number.

42978705 is an abundant number, since it is smaller than the sum of its proper divisors (43725423).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42978705 is a wasteful number, since it uses less digits than its factorization.

42978705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 42978705 is about 6555.8145946938. The cubic root of 42978705 is about 350.2819632630.

The spelling of 42978705 in words is "forty-two million, nine hundred seventy-eight thousand, seven hundred five".