1399367424 has 144 divisors (see below), whose sum is σ = 4584054272. Its totient is φ = 369045504.

The previous prime is 1399367413. The next prime is 1399367443. The reversal of 1399367424 is 4247639931.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 59877 + ... + 79899.

Almost surely, 2^1399367424 is an apocalyptic number.

1399367424 is a gapful number since it is divisible by the number (14) 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 1399367424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2292027136).

1399367424 is an abundant number, since it is smaller than the sum of its proper divisors (3184686848).

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

1399367424 is a wasteful number, since it uses less digits than its factorization.

1399367424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20062 (or 20048 counting only the distinct ones).

The product of its digits is 979776, while the sum is 48.

The square root of 1399367424 is about 37408.1197602873. The cubic root of 1399367424 is about 1118.5204272277.

The spelling of 1399367424 in words is "one billion, three hundred ninety-nine million, three hundred sixty-seven thousand, four hundred twenty-four".