440090901 has 40 divisors (see below), whose sum is σ = 722166720. Its totient is φ = 265845888.

The previous prime is 440090897. The next prime is 440090927. The reversal of 440090901 is 109090044.

It is not a de Polignac number, because 440090901 - 2² = 440090897 is a prime.

It is a super-2 number, since 2×440090901² = 387360002285983602, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440090201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 29181 + ... + 41613.

It is an arithmetic number, because the mean of its divisors is an integer number (18054168).

Almost surely, 2^440090901 is an apocalyptic number.

It is an amenable number.

440090901 is a deficient number, since it is larger than the sum of its proper divisors (282075819).

440090901 is a wasteful number, since it uses less digits than its factorization.

440090901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12487 (or 12478 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 440090901 is about 20978.3436190754. The cubic root of 440090901 is about 760.6428661490.

The spelling of 440090901 in words is "four hundred forty million, ninety thousand, nine hundred one".