10129928 has 8 divisors (see below), whose sum is σ = 18993630. Its totient is φ = 5064960.

The previous prime is 10129927. The next prime is 10129939. The reversal of 10129928 is 82992101.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7300804 + 2829124 = 2702^2 + 1682^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 10129894 and 10129903.

It is not an unprimeable number, because it can be changed into a prime (10129927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633113 + ... + 633128.

Almost surely, 2^10129928 is an apocalyptic number.

It is an amenable number.

10129928 is a deficient number, since it is larger than the sum of its proper divisors (8863702).

10129928 is a wasteful number, since it uses less digits than its factorization.

10129928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266247 (or 1266243 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 10129928 is about 3182.7547816318. The cubic root of 10129928 is about 216.3725281540.

The spelling of 10129928 in words is "ten million, one hundred twenty-nine thousand, nine hundred twenty-eight".