28230477 has 16 divisors (see below), whose sum is σ = 41152512. Its totient is φ = 17071920.

The previous prime is 28230473. The next prime is 28230481. The reversal of 28230477 is 77403282.

It is an interprime number because it is at equal distance from previous prime (28230473) and next prime (28230481).

It is not a de Polignac number, because 28230477 - 2² = 28230473 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28230473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25428 + ... + 26514.

It is an arithmetic number, because the mean of its divisors is an integer number (2572032).

Almost surely, 2^28230477 is an apocalyptic number.

It is an amenable number.

28230477 is a deficient number, since it is larger than the sum of its proper divisors (12922035).

28230477 is a wasteful number, since it uses less digits than its factorization.

28230477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888.

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 28230477 is about 5313.2360196024. The cubic root of 28230477 is about 304.4897928799.

The spelling of 28230477 in words is "twenty-eight million, two hundred thirty thousand, four hundred seventy-seven".