32128745 has 16 divisors (see below), whose sum is σ = 42776640. Its totient is φ = 22968000.

The previous prime is 32128729. The next prime is 32128757. The reversal of 32128745 is 54782123.

It is not a de Polignac number, because 32128745 - 2⁴ = 32128729 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1706 + ... + 8195.

It is an arithmetic number, because the mean of its divisors is an integer number (2673540).

Almost surely, 2^32128745 is an apocalyptic number.

It is an amenable number.

32128745 is a deficient number, since it is larger than the sum of its proper divisors (10647895).

32128745 is a wasteful number, since it uses less digits than its factorization.

32128745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9976.

The product of its digits is 13440, while the sum is 32.

The square root of 32128745 is about 5668.2223844870. Note that the first 3 decimals coincide. The cubic root of 32128745 is about 317.9054113939.

The spelling of 32128745 in words is "thirty-two million, one hundred twenty-eight thousand, seven hundred forty-five".