40931290 has 8 divisors (see below), whose sum is σ = 73676340. Its totient is φ = 16372512.

The previous prime is 40931269. The next prime is 40931299. The reversal of 40931290 is 9213904.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 40411449 + 519841 = 6357^2 + 721^2 .

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

It is not an unprimeable number, because it can be changed into a prime (40931299) 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, 2046555 + ... + 2046574.

Almost surely, 2^40931290 is an apocalyptic number.

40931290 is a deficient number, since it is larger than the sum of its proper divisors (32745050).

40931290 is a wasteful number, since it uses less digits than its factorization.

40931290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4093136.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 40931290 is about 6397.7566380724. The cubic root of 40931290 is about 344.6289927524.

The spelling of 40931290 in words is "forty million, nine hundred thirty-one thousand, two hundred ninety".