28154497 has 4 divisors (see below), whose sum is σ = 32176576. Its totient is φ = 24132420.

The previous prime is 28154471. The next prime is 28154509. The reversal of 28154497 is 79445182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28154497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28154437) 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, 2011029 + ... + 2011042.

It is an arithmetic number, because the mean of its divisors is an integer number (8044144).

Almost surely, 2^28154497 is an apocalyptic number.

It is an amenable number.

28154497 is a deficient number, since it is larger than the sum of its proper divisors (4022079).

28154497 is an equidigital number, since it uses as much as digits as its factorization.

28154497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4022078.

The product of its digits is 80640, while the sum is 40.

The square root of 28154497 is about 5306.0811339443. The cubic root of 28154497 is about 304.2163777219.

The spelling of 28154497 in words is "twenty-eight million, one hundred fifty-four thousand, four hundred ninety-seven".