109628865 has 48 divisors (see below), whose sum is σ = 198581760. Its totient is φ = 55883520.

The previous prime is 109628839. The next prime is 109628867. The reversal of 109628865 is 568826901.

109628865 is a `hidden beast` number, since 10 + 9 + 628 + 8 + 6 + 5 = 666.

It is not a de Polignac number, because 109628865 - 2⁷ = 109628737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 109628865.

It is not an unprimeable number, because it can be changed into a prime (109628867) 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, 123714 + ... + 124596.

It is an arithmetic number, because the mean of its divisors is an integer number (4137120).

Almost surely, 2^109628865 is an apocalyptic number.

109628865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

109628865 is a deficient number, since it is larger than the sum of its proper divisors (88952895).

109628865 is a wasteful number, since it uses less digits than its factorization.

109628865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014 (or 1011 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 109628865 is about 10470.3803655837. The cubic root of 109628865 is about 478.6025107691.

The spelling of 109628865 in words is "one hundred nine million, six hundred twenty-eight thousand, eight hundred sixty-five".