40909984 has 12 divisors (see below), whose sum is σ = 80541594. Its totient is φ = 20454976.

The previous prime is 40909969. The next prime is 40909997. The reversal of 40909984 is 48990904.

It can be written as a sum of positive squares in only one way, i.e., 35283600 + 5626384 = 5940^2 + 2372^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 40909984.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639187 + ... + 639250.

Almost surely, 2^40909984 is an apocalyptic number.

It is an amenable number.

40909984 is a deficient number, since it is larger than the sum of its proper divisors (39631610).

40909984 is a wasteful number, since it uses less digits than its factorization.

40909984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278447 (or 1278439 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 40909984 is about 6396.0913064152. The cubic root of 40909984 is about 344.5691856976.

The spelling of 40909984 in words is "forty million, nine hundred nine thousand, nine hundred eighty-four".