28451157 has 16 divisors (see below), whose sum is σ = 44090880. Its totient is φ = 15981552.

The previous prime is 28451153. The next prime is 28451173. The reversal of 28451157 is 75115482.

It is not a de Polignac number, because 28451157 - 2² = 28451153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28451153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10243 + ... + 12720.

It is an arithmetic number, because the mean of its divisors is an integer number (2755680).

Almost surely, 2^28451157 is an apocalyptic number.

It is an amenable number.

28451157 is a deficient number, since it is larger than the sum of its proper divisors (15639723).

28451157 is a wasteful number, since it uses less digits than its factorization.

28451157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23032.

The product of its digits is 11200, while the sum is 33.

The square root of 28451157 is about 5333.9625982941. The cubic root of 28451157 is about 305.2811418275.

The spelling of 28451157 in words is "twenty-eight million, four hundred fifty-one thousand, one hundred fifty-seven".