28773538 has 8 divisors (see below), whose sum is σ = 43706880. Its totient is φ = 14204580.

The previous prime is 28773523. The next prime is 28773551. The reversal of 28773538 is 83537782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 28773494 and 28773503.

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, 90898 + ... + 91213.

It is an arithmetic number, because the mean of its divisors is an integer number (5463360).

Almost surely, 2^28773538 is an apocalyptic number.

28773538 is a deficient number, since it is larger than the sum of its proper divisors (14933342).

28773538 is a wasteful number, since it uses less digits than its factorization.

28773538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182192.

The product of its digits is 282240, while the sum is 43.

The square root of 28773538 is about 5364.0971281288. The cubic root of 28773538 is about 306.4298641889.

The spelling of 28773538 in words is "twenty-eight million, seven hundred seventy-three thousand, five hundred thirty-eight".