28455427 has 48 divisors (see below), whose sum is σ = 40449024. Its totient is φ = 19656000.

The previous prime is 28455421. The next prime is 28455443. The reversal of 28455427 is 72455482.

It is a happy number.

It is not a de Polignac number, because 28455427 - 2⁷ = 28455299 is a prime.

It is a super-2 number, since 2×28455427² = 1619422651504658, which contains 22 as substring.

Its product of digits (89600) is a multiple of the sum of its prime factors (200).

It is not an unprimeable number, because it can be changed into a prime (28455421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 217152 + ... + 217282.

It is an arithmetic number, because the mean of its divisors is an integer number (842688).

Almost surely, 2^28455427 is an apocalyptic number.

28455427 is a deficient number, since it is larger than the sum of its proper divisors (11993597).

28455427 is a wasteful number, since it uses less digits than its factorization.

28455427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 193 counting only the distinct ones).

The product of its digits is 89600, while the sum is 37.

The square root of 28455427 is about 5334.3628485509. The cubic root of 28455427 is about 305.2964134416.

It can be divided in two parts, 28455 and 427, that added together give a palindrome (28882).

The spelling of 28455427 in words is "twenty-eight million, four hundred fifty-five thousand, four hundred twenty-seven".