28373445 has 12 divisors (see below), whose sum is σ = 49180716. Its totient is φ = 15132480.

The previous prime is 28373431. The next prime is 28373453. The reversal of 28373445 is 54437382.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7001316 + 21372129 = 2646^2 + 4623^2 .

It is not a de Polignac number, because 28373445 - 2¹² = 28369349 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 315216 + ... + 315305.

It is an arithmetic number, because the mean of its divisors is an integer number (4098393).

Almost surely, 2^28373445 is an apocalyptic number.

It is an amenable number.

28373445 is a deficient number, since it is larger than the sum of its proper divisors (20807271).

28373445 is a wasteful number, since it uses less digits than its factorization.

28373445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630532 (or 630529 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 28373445 is about 5326.6729766337. The cubic root of 28373445 is about 305.0029382499.

The spelling of 28373445 in words is "twenty-eight million, three hundred seventy-three thousand, four hundred forty-five".