40904946 has 64 divisors (see below), whose sum is σ = 94556160. Its totient is φ = 13098960.

The previous prime is 40904939. The next prime is 40904951. The reversal of 40904946 is 64940904.

It is a self number, because there is not a number n which added to its sum of digits gives 40904946.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 180085 + ... + 180311.

It is an arithmetic number, because the mean of its divisors is an integer number (1477440).

Almost surely, 2^40904946 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40904946, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47278080).

40904946 is an abundant number, since it is smaller than the sum of its proper divisors (53651214).

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

40904946 is a wasteful number, since it uses less digits than its factorization.

40904946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356 (or 350 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 40904946 is about 6395.6974600117. The cubic root of 40904946 is about 344.5550407330. Note that the first 3 decimals are identical.

The spelling of 40904946 in words is "forty million, nine hundred four thousand, nine hundred forty-six".