1024401399 has 16 divisors (see below), whose sum is σ = 1592851200. Its totient is φ = 585371640.

The previous prime is 1024401377. The next prime is 1024401401. The reversal of 1024401399 is 9931044201.

It is not a de Polignac number, because 1024401399 - 2⁷ = 1024401271 is a prime.

It is a super-3 number, since 3×1024401399³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1024401319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 496737 + ... + 498794.

It is an arithmetic number, because the mean of its divisors is an integer number (99553200).

Almost surely, 2^1024401399 is an apocalyptic number.

1024401399 is a deficient number, since it is larger than the sum of its proper divisors (568449801).

1024401399 is an frugal number, since it uses more digits than its factorization.

1024401399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 995555 (or 995541 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 1024401399 is about 32006.2712448670. The cubic root of 1024401399 is about 1008.0685235053.

The spelling of 1024401399 in words is "one billion, twenty-four million, four hundred one thousand, three hundred ninety-nine".