440021090 has 16 divisors (see below), whose sum is σ = 793248120. Its totient is φ = 175739520.

The previous prime is 440021083. The next prime is 440021111. The reversal of 440021090 is 90120044.

It can be written as a sum of positive squares in 4 ways, for example, as 300710281 + 139310809 = 17341^2 + 11803^2 .

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, 26675 + ... + 39894.

Almost surely, 2^440021090 is an apocalyptic number.

440021090 is a deficient number, since it is larger than the sum of its proper divisors (353227030).

440021090 is a wasteful number, since it uses less digits than its factorization.

440021090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67237.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 440021090 is about 20976.6796705294. The cubic root of 440021090 is about 760.6026441199.

The spelling of 440021090 in words is "four hundred forty million, twenty-one thousand, ninety".