40565290 has 8 divisors (see below), whose sum is σ = 73017540. Its totient is φ = 16226112.

The previous prime is 40565279. The next prime is 40565339. The reversal of 40565290 is 9256504.

It can be written as a sum of positive squares in 2 ways, for example, as 40030929 + 534361 = 6327^2 + 731^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 2028255 + ... + 2028274.

Almost surely, 2^40565290 is an apocalyptic number.

40565290 is a deficient number, since it is larger than the sum of its proper divisors (32452250).

40565290 is a wasteful number, since it uses less digits than its factorization.

40565290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4056536.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 40565290 is about 6369.0886318217. The cubic root of 40565290 is about 343.5987129313.

The spelling of 40565290 in words is "forty million, five hundred sixty-five thousand, two hundred ninety".