28432051 has 4 divisors (see below), whose sum is σ = 28467504. Its totient is φ = 28396600.

The previous prime is 28432013. The next prime is 28432057. The reversal of 28432051 is 15023482.

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 28432051 - 2⁹ = 28431539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28432057) 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, 16495 + ... + 18136.

It is an arithmetic number, because the mean of its divisors is an integer number (7116876).

Almost surely, 2^28432051 is an apocalyptic number.

28432051 is a deficient number, since it is larger than the sum of its proper divisors (35453).

28432051 is an equidigital number, since it uses as much as digits as its factorization.

28432051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35452.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 28432051 is about 5332.1713213287. The cubic root of 28432051 is about 305.2127906809.

The spelling of 28432051 in words is "twenty-eight million, four hundred thirty-two thousand, fifty-one".