1325729928 has 16 divisors (see below), whose sum is σ = 3314324880. Its totient is φ = 441909968.

The previous prime is 1325729927. The next prime is 1325729929. The reversal of 1325729928 is 8299275231.

It is an interprime number because it is at equal distance from previous prime (1325729927) and next prime (1325729929).

It is not an unprimeable number, because it can be changed into a prime (1325729927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27619350 + ... + 27619397.

It is an arithmetic number, because the mean of its divisors is an integer number (207145305).

Almost surely, 2^1325729928 is an apocalyptic number.

It is an amenable number.

1325729928 is an abundant number, since it is smaller than the sum of its proper divisors (1988594952).

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

1325729928 is a wasteful number, since it uses less digits than its factorization.

1325729928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55238756 (or 55238752 counting only the distinct ones).

The product of its digits is 544320, while the sum is 48.

The square root of 1325729928 is about 36410.5743981058. The cubic root of 1325729928 is about 1098.5462691659.

The spelling of 1325729928 in words is "one billion, three hundred twenty-five million, seven hundred twenty-nine thousand, nine hundred twenty-eight".