1399403472 has 80 divisors (see below), whose sum is σ = 3750593280. Its totient is φ = 449280000.

The previous prime is 1399403449. The next prime is 1399403483. The reversal of 1399403472 is 2743049931.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150972 + ... + 159972.

It is an arithmetic number, because the mean of its divisors is an integer number (46882416).

Almost surely, 2^1399403472 is an apocalyptic number.

1399403472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1399403472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1875296640).

1399403472 is an abundant number, since it is smaller than the sum of its proper divisors (2351189808).

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

1399403472 is a wasteful number, since it uses less digits than its factorization.

1399403472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9132 (or 9126 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 1399403472 is about 37408.6015777120. The cubic root of 1399403472 is about 1118.5300315860.

The spelling of 1399403472 in words is "one billion, three hundred ninety-nine million, four hundred three thousand, four hundred seventy-two".