28140130 has 8 divisors (see below), whose sum is σ = 50652252. Its totient is φ = 11256048.

The previous prime is 28140097. The next prime is 28140131. The reversal of 28140130 is 3104182.

It can be written as a sum of positive squares in 2 ways, for example, as 27594009 + 546121 = 5253^2 + 739^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 28140098 and 28140107.

It is not an unprimeable number, because it can be changed into a prime (28140131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1406997 + ... + 1407016.

Almost surely, 2^28140130 is an apocalyptic number.

28140130 is a deficient number, since it is larger than the sum of its proper divisors (22512122).

28140130 is a wasteful number, since it uses less digits than its factorization.

28140130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2814020.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 28140130 is about 5304.7271371862. The cubic root of 28140130 is about 304.1646225755.

The spelling of 28140130 in words is "twenty-eight million, one hundred forty thousand, one hundred thirty".