28273144 has 16 divisors (see below), whose sum is σ = 54840600. Its totient is φ = 13648992.

The previous prime is 28273117. The next prime is 28273171. The reversal of 28273144 is 44137282.

It is an interprime number because it is at equal distance from previous prime (28273117) and next prime (28273171).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60702 + ... + 61165.

Almost surely, 2^28273144 is an apocalyptic number.

It is an amenable number.

28273144 is a deficient number, since it is larger than the sum of its proper divisors (26567456).

28273144 is a wasteful number, since it uses less digits than its factorization.

28273144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121902 (or 121898 counting only the distinct ones).

The product of its digits is 10752, while the sum is 31.

The square root of 28273144 is about 5317.2496650054. The cubic root of 28273144 is about 304.6431156685.

The spelling of 28273144 in words is "twenty-eight million, two hundred seventy-three thousand, one hundred forty-four".