28130651 has 4 divisors (see below), whose sum is σ = 28661472. Its totient is φ = 27599832.

The previous prime is 28130647. The next prime is 28130653. The reversal of 28130651 is 15603182.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28130651 - 2² = 28130647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28130651.

It is not an unprimeable number, because it can be changed into a prime (28130653) 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, 265331 + ... + 265436.

It is an arithmetic number, because the mean of its divisors is an integer number (7165368).

Almost surely, 2^28130651 is an apocalyptic number.

28130651 is a deficient number, since it is larger than the sum of its proper divisors (530821).

28130651 is an equidigital number, since it uses as much as digits as its factorization.

28130651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530820.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 28130651 is about 5303.8336135290. The cubic root of 28130651 is about 304.1304661323.

The spelling of 28130651 in words is "twenty-eight million, one hundred thirty thousand, six hundred fifty-one".