1025405444 has 24 divisors (see below), whose sum is σ = 2052355200. Its totient is φ = 439128576.

The previous prime is 1025405431. The next prime is 1025405467. The reversal of 1025405444 is 4445045201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26084 + ... + 52260.

It is an arithmetic number, because the mean of its divisors is an integer number (85514800).

Almost surely, 2^1025405444 is an apocalyptic number.

1025405444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1025405444 is an abundant number, since it is smaller than the sum of its proper divisors (1026949756).

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

1025405444 is a wasteful number, since it uses less digits than its factorization.

1025405444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27587 (or 27585 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

The square root of 1025405444 is about 32021.9525325986. The cubic root of 1025405444 is about 1008.3977615246.

The spelling of 1025405444 in words is "one billion, twenty-five million, four hundred five thousand, four hundred forty-four".