40689984 has 28 divisors (see below), whose sum is σ = 107659424. Its totient is φ = 13563264.

The previous prime is 40689983. The next prime is 40690007. The reversal of 40689984 is 48998604.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40689983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105772 + ... + 106155.

Almost surely, 2^40689984 is an apocalyptic number.

It is an amenable number.

40689984 is an abundant number, since it is smaller than the sum of its proper divisors (66969440).

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

40689984 is a wasteful number, since it uses less digits than its factorization.

40689984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211942 (or 211932 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 40689984 is about 6378.8701193863. The cubic root of 40689984 is about 343.9504165059.

The spelling of 40689984 in words is "forty million, six hundred eighty-nine thousand, nine hundred eighty-four".