1399497444 has 36 divisors (see below), whose sum is σ = 3623905740. Its totient is φ = 455120640.

The previous prime is 1399497439. The next prime is 1399497469. The reversal of 1399497444 is 4447949931.

It can be written as a sum of positive squares in 2 ways, for example, as 619412544 + 780084900 = 24888^2 + 27930^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 472609 + ... + 475560.

Almost surely, 2^1399497444 is an apocalyptic number.

It is an amenable number.

1399497444 is an abundant number, since it is smaller than the sum of its proper divisors (2224408296).

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

1399497444 is a wasteful number, since it uses less digits than its factorization.

1399497444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948220 (or 948215 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The square root of 1399497444 is about 37409.8575779165. The cubic root of 1399497444 is about 1118.5550680041. Note that the first 3 decimals are identical.

The spelling of 1399497444 in words is "one billion, three hundred ninety-nine million, four hundred ninety-seven thousand, four hundred forty-four".