28838537 has 8 divisors (see below), whose sum is σ = 35493696. Its totient is φ = 22817232.

The previous prime is 28838531. The next prime is 28838569. The reversal of 28838537 is 73583882.

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

It is a cyclic number.

It is not a de Polignac number, because 28838537 - 2⁴ = 28838521 is a prime.

It is a super-2 number, since 2×28838537² = 1663322432600738, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28838531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158363 + ... + 158544.

It is an arithmetic number, because the mean of its divisors is an integer number (4436712).

Almost surely, 2^28838537 is an apocalyptic number.

It is an amenable number.

28838537 is a deficient number, since it is larger than the sum of its proper divisors (6655159).

28838537 is a wasteful number, since it uses less digits than its factorization.

28838537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316927.

The product of its digits is 322560, while the sum is 44.

The square root of 28838537 is about 5370.1524186935. The cubic root of 28838537 is about 306.6604308488.

The spelling of 28838537 in words is "twenty-eight million, eight hundred thirty-eight thousand, five hundred thirty-seven".