1399089416 has 8 divisors (see below), whose sum is σ = 2623292670. Its totient is φ = 699544704.

The previous prime is 1399089413. The next prime is 1399089421. The reversal of 1399089416 is 6149809931.

It can be written as a sum of positive squares in only one way, i.e., 904204900 + 494884516 = 30070^2 + 22246^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1399089413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 87443081 + ... + 87443096.

Almost surely, 2^1399089416 is an apocalyptic number.

It is an amenable number.

1399089416 is a deficient number, since it is larger than the sum of its proper divisors (1224203254).

1399089416 is a wasteful number, since it uses less digits than its factorization.

1399089416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174886183 (or 174886179 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 50.

The square root of 1399089416 is about 37404.4036979605. The cubic root of 1399089416 is about 1118.4463513236.

The spelling of 1399089416 in words is "one billion, three hundred ninety-nine million, eighty-nine thousand, four hundred sixteen".