28151457 has 8 divisors (see below), whose sum is σ = 38095776. Its totient is φ = 18487392.

The previous prime is 28151447. The next prime is 28151477. The reversal of 28151457 is 75415182.

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

It is not a de Polignac number, because 28151457 - 2⁶ = 28151393 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (28151447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69828 + ... + 70229.

It is an arithmetic number, because the mean of its divisors is an integer number (4761972).

Almost surely, 2^28151457 is an apocalyptic number.

It is an amenable number.

28151457 is a deficient number, since it is larger than the sum of its proper divisors (9944319).

28151457 is a wasteful number, since it uses less digits than its factorization.

28151457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140127.

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

The square root of 28151457 is about 5305.7946624422. The cubic root of 28151457 is about 304.2054280079.

The spelling of 28151457 in words is "twenty-eight million, one hundred fifty-one thousand, four hundred fifty-seven".