28646436 has 96 divisors (see below), whose sum is σ = 84609280. Its totient is φ = 7340544.

The previous prime is 28646419. The next prime is 28646467. The reversal of 28646436 is 63464682.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 28646394 and 28646403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40050 + ... + 40758.

Almost surely, 2^28646436 is an apocalyptic number.

28646436 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 28646436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42304640).

28646436 is an abundant number, since it is smaller than the sum of its proper divisors (55962844).

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

28646436 is a wasteful number, since it uses less digits than its factorization.

28646436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773 (or 771 counting only the distinct ones).

The product of its digits is 165888, while the sum is 39.

The square root of 28646436 is about 5352.2365418580. The cubic root of 28646436 is about 305.9779983327.

The spelling of 28646436 in words is "twenty-eight million, six hundred forty-six thousand, four hundred thirty-six".