28424276 has 6 divisors (see below), whose sum is σ = 49742490. Its totient is φ = 14212136.

The previous prime is 28424243. The next prime is 28424287. The reversal of 28424276 is 67242482.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 28408900 + 15376 = 5330^2 + 124^2 .

It is a super-2 number, since 2×28424276² = 1615878932248352, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3553031 + ... + 3553038.

It is an arithmetic number, because the mean of its divisors is an integer number (8290415).

Almost surely, 2^28424276 is an apocalyptic number.

It is an amenable number.

28424276 is a deficient number, since it is larger than the sum of its proper divisors (21318214).

28424276 is a wasteful number, since it uses less digits than its factorization.

28424276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7106073 (or 7106071 counting only the distinct ones).

The product of its digits is 43008, while the sum is 35.

The square root of 28424276 is about 5331.4422063828. The cubic root of 28424276 is about 305.1849670839.

The spelling of 28424276 in words is "twenty-eight million, four hundred twenty-four thousand, two hundred seventy-six".