28837749 has 8 divisors (see below), whose sum is σ = 38554912. Its totient is φ = 19172880.

The previous prime is 28837703. The next prime is 28837751. The reversal of 28837749 is 94773882.

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

It is not a de Polignac number, because 28837749 - 2¹² = 28833653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28837698 and 28837707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28837789) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11767 + ... + 14004.

It is an arithmetic number, because the mean of its divisors is an integer number (4819364).

Almost surely, 2^28837749 is an apocalyptic number.

It is an amenable number.

28837749 is a deficient number, since it is larger than the sum of its proper divisors (9717163).

28837749 is a wasteful number, since it uses less digits than its factorization.

28837749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26147.

The product of its digits is 677376, while the sum is 48.

The square root of 28837749 is about 5370.0790496975. The cubic root of 28837749 is about 306.6576377041.

The spelling of 28837749 in words is "twenty-eight million, eight hundred thirty-seven thousand, seven hundred forty-nine".