2909428725 has 48 divisors (see below), whose sum is σ = 5551966080. Its totient is φ = 1316832000.

The previous prime is 2909428681. The next prime is 2909428727. The reversal of 2909428725 is 5278249092.

It is not a de Polignac number, because 2909428725 - 2⁶ = 2909428661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2909428727) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25591 + ... + 80459.

It is an arithmetic number, because the mean of its divisors is an integer number (115665960).

Almost surely, 2^2909428725 is an apocalyptic number.

2909428725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2909428725 is a deficient number, since it is larger than the sum of its proper divisors (2642537355).

2909428725 is a wasteful number, since it uses less digits than its factorization.

2909428725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54990 (or 54985 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The square root of 2909428725 is about 53939.1205434423. The cubic root of 2909428725 is about 1427.5869658700.

The spelling of 2909428725 in words is "two billion, nine hundred nine million, four hundred twenty-eight thousand, seven hundred twenty-five".