1399455792 has 400 divisors, whose sum is σ = 5098959360. Its totient is φ = 361304064.

The previous prime is 1399455737. The next prime is 1399455797. The reversal of 1399455792 is 2975549931.

1399455792 is a `hidden beast` number, since 13 + 99 + 455 + 7 + 92 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1399455797) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3964288 + ... + 3964640.

Almost surely, 2^1399455792 is an apocalyptic number.

1399455792 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 1399455792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2549479680).

1399455792 is an abundant number, since it is smaller than the sum of its proper divisors (3699503568).

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

1399455792 is a wasteful number, since it uses less digits than its factorization.

1399455792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422 (or 407 counting only the distinct ones).

The product of its digits is 3061800, while the sum is 54.

The square root of 1399455792 is about 37409.3008755844. The cubic root of 1399455792 is about 1118.5439710402.

The spelling of 1399455792 in words is "one billion, three hundred ninety-nine million, four hundred fifty-five thousand, seven hundred ninety-two".