440090397 has 6 divisors (see below), whose sum is σ = 635686142. Its totient is φ = 293393592.

The previous prime is 440090393. The next prime is 440090437. The reversal of 440090397 is 793090044.

It can be written as a sum of positive squares in only one way, i.e., 333464121 + 106626276 = 18261^2 + 10326^2 .

It is not a de Polignac number, because 440090397 - 2² = 440090393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440090393) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24449458 + ... + 24449475.

Almost surely, 2^440090397 is an apocalyptic number.

It is an amenable number.

440090397 is a deficient number, since it is larger than the sum of its proper divisors (195595745).

440090397 is a wasteful number, since it uses less digits than its factorization.

440090397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48898939 (or 48898936 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 440090397 is about 20978.3316066841. The cubic root of 440090397 is about 760.6425757816.

The spelling of 440090397 in words is "four hundred forty million, ninety thousand, three hundred ninety-seven".