40990568 has 8 divisors (see below), whose sum is σ = 76857330. Its totient is φ = 20495280.

The previous prime is 40990513. The next prime is 40990589. The reversal of 40990568 is 86509904.

It can be written as a sum of positive squares in only one way, i.e., 40475044 + 515524 = 6362^2 + 718^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2561903 + ... + 2561918.

Almost surely, 2^40990568 is an apocalyptic number.

It is an amenable number.

40990568 is a deficient number, since it is larger than the sum of its proper divisors (35866762).

40990568 is a wasteful number, since it uses less digits than its factorization.

40990568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5123827 (or 5123823 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 40990568 is about 6402.3876796083. The cubic root of 40990568 is about 344.7952800713.

The spelling of 40990568 in words is "forty million, nine hundred ninety thousand, five hundred sixty-eight".