1078389725 has 24 divisors (see below), whose sum is σ = 1532931648. Its totient is φ = 737193600.

The previous prime is 1078389691. The next prime is 1078389743. The reversal of 1078389725 is 5279838701.

It is not a de Polignac number, because 1078389725 - 2⁸ = 1078389469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48617 + ... + 67233.

It is an arithmetic number, because the mean of its divisors is an integer number (63872152).

Almost surely, 2^1078389725 is an apocalyptic number.

It is an amenable number.

1078389725 is a deficient number, since it is larger than the sum of its proper divisors (454541923).

1078389725 is a wasteful number, since it uses less digits than its factorization.

1078389725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18965 (or 18960 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 50.

The square root of 1078389725 is about 32838.8447573906. The cubic root of 1078389725 is about 1025.4754011258.

The spelling of 1078389725 in words is "one billion, seventy-eight million, three hundred eighty-nine thousand, seven hundred twenty-five".