28464436 has 48 divisors (see below), whose sum is σ = 66890880. Its totient is φ = 10235520.

The previous prime is 28464431. The next prime is 28464437. The reversal of 28464436 is 63446482.

It is a junction number, because it is equal to n+sod(n) for n = 28464395 and 28464404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28464431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 450 + ... + 7558.

It is an arithmetic number, because the mean of its divisors is an integer number (1393560).

Almost surely, 2^28464436 is an apocalyptic number.

28464436 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28464436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33445440).

28464436 is an abundant number, since it is smaller than the sum of its proper divisors (38426444).

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

28464436 is a wasteful number, since it uses less digits than its factorization.

28464436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7144 (or 7142 counting only the distinct ones).

The product of its digits is 110592, while the sum is 37.

The square root of 28464436 is about 5335.2072124708. The cubic root of 28464436 is about 305.3286290324.

It can be divided in two parts, 28464 and 436, that added together give a square (28900 = 170²).

The spelling of 28464436 in words is "twenty-eight million, four hundred sixty-four thousand, four hundred thirty-six".