28739376 has 60 divisors (see below), whose sum is σ = 81212560. Its totient is φ = 9486720.

The previous prime is 28739363. The next prime is 28739383. The reversal of 28739376 is 67393782.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14781 + ... + 16611.

Almost surely, 2^28739376 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28739376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40606280).

28739376 is an abundant number, since it is smaller than the sum of its proper divisors (52473184).

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

28739376 is a wasteful number, since it uses less digits than its factorization.

28739376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1954 (or 1945 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 28739376 is about 5360.9118627338. The cubic root of 28739376 is about 306.3085443539.

It can be divided in two parts, 2 and 8739376, that added together give a palindrome (8739378).

The spelling of 28739376 in words is "twenty-eight million, seven hundred thirty-nine thousand, three hundred seventy-six".