28273396 has 6 divisors (see below), whose sum is σ = 49478450. Its totient is φ = 14136696.

The previous prime is 28273373. The next prime is 28273409. The reversal of 28273396 is 69337282.

It can be written as a sum of positive squares in only one way, i.e., 22221796 + 6051600 = 4714^2 + 2460^2 .

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, 3534171 + ... + 3534178.

Almost surely, 2^28273396 is an apocalyptic number.

It is an amenable number.

28273396 is a deficient number, since it is larger than the sum of its proper divisors (21205054).

28273396 is a wasteful number, since it uses less digits than its factorization.

28273396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7068353 (or 7068351 counting only the distinct ones).

The product of its digits is 108864, while the sum is 40.

The square root of 28273396 is about 5317.2733614137. The cubic root of 28273396 is about 304.6440207657.

The spelling of 28273396 in words is "twenty-eight million, two hundred seventy-three thousand, three hundred ninety-six".