40997784 has 32 divisors (see below), whose sum is σ = 102654720. Its totient is φ = 13644576.

The previous prime is 40997777. The next prime is 40997807. The reversal of 40997784 is 48779904.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24709 + ... + 26315.

It is an arithmetic number, because the mean of its divisors is an integer number (3207960).

Almost surely, 2^40997784 is an apocalyptic number.

It is an amenable number.

40997784 is an abundant number, since it is smaller than the sum of its proper divisors (61656936).

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

40997784 is a wasteful number, since it uses less digits than its factorization.

40997784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2679 (or 2675 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 48.

The square root of 40997784 is about 6402.9511945665. The cubic root of 40997784 is about 344.8155115285.

The spelling of 40997784 in words is "forty million, nine hundred ninety-seven thousand, seven hundred eighty-four".