40985778 has 32 divisors (see below), whose sum is σ = 84137472. Its totient is φ = 13305600.

The previous prime is 40985767. The next prime is 40985783. The reversal of 40985778 is 87758904.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40863 + ... + 41853.

It is an arithmetic number, because the mean of its divisors is an integer number (2629296).

Almost surely, 2^40985778 is an apocalyptic number.

40985778 is an abundant number, since it is smaller than the sum of its proper divisors (43151694).

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

40985778 is a wasteful number, since it uses less digits than its factorization.

40985778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170.

The product of its (nonzero) digits is 564480, while the sum is 48.

The square root of 40985778 is about 6402.0135894889. The cubic root of 40985778 is about 344.7818490651.

The spelling of 40985778 in words is "forty million, nine hundred eighty-five thousand, seven hundred seventy-eight".