28373444 has 48 divisors (see below), whose sum is σ = 57697920. Its totient is φ = 12103520.

The previous prime is 28373431. The next prime is 28373453. The reversal of 28373444 is 44437382.

It is a super-2 number, since 2×28373444² = 1610104648842272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 535322 + ... + 535374.

It is an arithmetic number, because the mean of its divisors is an integer number (1202040).

Almost surely, 2^28373444 is an apocalyptic number.

It is an amenable number.

28373444 is an abundant number, since it is smaller than the sum of its proper divisors (29324476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28373444 is a wasteful number, since it uses less digits than its factorization.

28373444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 89 counting only the distinct ones).

The product of its digits is 64512, while the sum is 35.

The square root of 28373444 is about 5326.6728827665. The cubic root of 28373444 is about 305.0029346667.

The spelling of 28373444 in words is "twenty-eight million, three hundred seventy-three thousand, four hundred forty-four".