107155728 has 30 divisors (see below), whose sum is σ = 299887614. Its totient is φ = 35718528.

The previous prime is 107155721. The next prime is 107155793. The reversal of 107155728 is 827551701.

107155728 is a `hidden beast` number, since 10 + 71 + 5 + 572 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 75481344 + 31674384 = 8688^2 + 5628^2 .

It is a super-2 number, since 2×107155728² = 22964700086419968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 107155692 and 107155701.

It is not an unprimeable number, because it can be changed into a prime (107155721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 371925 + ... + 372212.

Almost surely, 2^107155728 is an apocalyptic number.

107155728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

107155728 is an abundant number, since it is smaller than the sum of its proper divisors (192731886).

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

107155728 is a wasteful number, since it uses less digits than its factorization.

107155728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744151 (or 744142 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 36.

The square root of 107155728 is about 10351.6050929312. The cubic root of 107155728 is about 474.9761435849.

The spelling of 107155728 in words is "one hundred seven million, one hundred fifty-five thousand, seven hundred twenty-eight".