1025398404 has 36 divisors (see below), whose sum is σ = 2593019520. Its totient is φ = 341662320.

The previous prime is 1025398399. The next prime is 1025398421. The reversal of 1025398404 is 4048935201.

1025398404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128277 + ... + 136035.

It is an arithmetic number, because the mean of its divisors is an integer number (72028320).

Almost surely, 2^1025398404 is an apocalyptic number.

It is an amenable number.

1025398404 is an abundant number, since it is smaller than the sum of its proper divisors (1567621116).

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

1025398404 is a wasteful number, since it uses less digits than its factorization.

1025398404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11440 (or 11435 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1025398404 is about 32021.8426078201. The cubic root of 1025398404 is about 1008.3954537752.

The spelling of 1025398404 in words is "one billion, twenty-five million, three hundred ninety-eight thousand, four hundred four".