42986178 has 24 divisors (see below), whose sum is σ = 96349500. Its totient is φ = 13834464.

The previous prime is 42986173. The next prime is 42986179. The reversal of 42986178 is 87168924.

42986178 is a `hidden beast` number, since 4 + 29 + 8 + 617 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 42419169 + 567009 = 6513^2 + 753^2 .

It is a super-2 number, since 2×42986178² = 3695622998095368, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (42986171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40653 + ... + 41696.

Almost surely, 2^42986178 is an apocalyptic number.

42986178 is an abundant number, since it is smaller than the sum of its proper divisors (53363322).

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

42986178 is a wasteful number, since it uses less digits than its factorization.

42986178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82386 (or 82383 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 42986178 is about 6556.3845219755. The cubic root of 42986178 is about 350.3022640562.

The spelling of 42986178 in words is "forty-two million, nine hundred eighty-six thousand, one hundred seventy-eight".