440666420 has 12 divisors (see below), whose sum is σ = 925399524. Its totient is φ = 176266560.

The previous prime is 440666419. The next prime is 440666431. The reversal of 440666420 is 24666044.

It can be written as a sum of positive squares in 2 ways, for example, as 76772644 + 363893776 = 8762^2 + 19076^2 .

It is a congruent number.

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, 11016641 + ... + 11016680.

It is an arithmetic number, because the mean of its divisors is an integer number (77116627).

Almost surely, 2^440666420 is an apocalyptic number.

It is an amenable number.

440666420 is an abundant number, since it is smaller than the sum of its proper divisors (484733104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

440666420 is a wasteful number, since it uses less digits than its factorization.

440666420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22033330 (or 22033328 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 440666420 is about 20992.0561165408. The cubic root of 440666420 is about 760.9742929320.

The spelling of 440666420 in words is "four hundred forty million, six hundred sixty-six thousand, four hundred twenty".