40649684 has 12 divisors (see below), whose sum is σ = 71215284. Its totient is φ = 20302464.

The previous prime is 40649659. The next prime is 40649699. The reversal of 40649684 is 48694604.

It can be written as a sum of positive squares in 2 ways, for example, as 32239684 + 8410000 = 5678^2 + 2900^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1109 + ... + 9084.

It is an arithmetic number, because the mean of its divisors is an integer number (5934607).

Almost surely, 2^40649684 is an apocalyptic number.

It is an amenable number.

40649684 is a deficient number, since it is larger than the sum of its proper divisors (30565600).

40649684 is a wasteful number, since it uses less digits than its factorization.

40649684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11194 (or 11192 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 40649684 is about 6375.7104702143. The cubic root of 40649684 is about 343.8368276972.

The spelling of 40649684 in words is "forty million, six hundred forty-nine thousand, six hundred eighty-four".