28739464 has 48 divisors (see below), whose sum is σ = 60444900. Its totient is φ = 12789504.

The previous prime is 28739441. The next prime is 28739467. The reversal of 28739464 is 46493782.

It can be written as a sum of positive squares in 6 ways, for example, as 12659364 + 16080100 = 3558^2 + 4010^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28739464.

It is not an unprimeable number, because it can be changed into a prime (28739467) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38842 + ... + 39574.

Almost surely, 2^28739464 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 28739464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30222450).

28739464 is an abundant number, since it is smaller than the sum of its proper divisors (31705436).

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

28739464 is a wasteful number, since it uses less digits than its factorization.

28739464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794 (or 777 counting only the distinct ones).

The product of its digits is 290304, while the sum is 43.

The square root of 28739464 is about 5360.9200702864. The cubic root of 28739464 is about 306.3088569927.

The spelling of 28739464 in words is "twenty-eight million, seven hundred thirty-nine thousand, four hundred sixty-four".