28277433 has 6 divisors (see below), whose sum is σ = 40845194. Its totient is φ = 18851616.

The previous prime is 28277429. The next prime is 28277437. The reversal of 28277433 is 33477282.

It is an interprime number because it is at equal distance from previous prime (28277429) and next prime (28277437).

It can be written as a sum of positive squares in only one way, i.e., 21790224 + 6487209 = 4668^2 + 2547^2 .

It is not a de Polignac number, because 28277433 - 2² = 28277429 is a prime.

It is a super-2 number, since 2×28277433² = 1599226434138978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28277437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1570960 + ... + 1570977.

Almost surely, 2^28277433 is an apocalyptic number.

It is an amenable number.

28277433 is a deficient number, since it is larger than the sum of its proper divisors (12567761).

28277433 is a wasteful number, since it uses less digits than its factorization.

28277433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3141943 (or 3141940 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The square root of 28277433 is about 5317.6529597182. The cubic root of 28277433 is about 304.6585195473.

The spelling of 28277433 in words is "twenty-eight million, two hundred seventy-seven thousand, four hundred thirty-three".