845128372 has 36 divisors (see below), whose sum is σ = 1640943360. Its totient is φ = 380535760.

The previous prime is 845128357. The next prime is 845128387. The reversal of 845128372 is 273821548.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (845128357) and next prime (845128387).

It is a congruent number.

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, 43629 + ... + 59947.

It is an arithmetic number, because the mean of its divisors is an integer number (45581760).

Almost surely, 2^845128372 is an apocalyptic number.

It is an amenable number.

845128372 is a deficient number, since it is larger than the sum of its proper divisors (795814988).

845128372 is a wasteful number, since it uses less digits than its factorization.

845128372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16452 (or 16439 counting only the distinct ones).

The product of its digits is 107520, while the sum is 40.

The square root of 845128372 is about 29071.0916891678. The cubic root of 845128372 is about 945.4550674452.

The spelling of 845128372 in words is "eight hundred forty-five million, one hundred twenty-eight thousand, three hundred seventy-two".