28619240 has 64 divisors (see below), whose sum is σ = 70882560. Its totient is φ = 10333440.

The previous prime is 28619221. The next prime is 28619257. The reversal of 28619240 is 4291682.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28619197 and 28619206.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 23855 + ... + 25025.

It is an arithmetic number, because the mean of its divisors is an integer number (1107540).

Almost surely, 2^28619240 is an apocalyptic number.

28619240 is a gapful number since it is divisible by the number (20) 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 28619240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35441280).

28619240 is an abundant number, since it is smaller than the sum of its proper divisors (42263320).

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

28619240 is a wasteful number, since it uses less digits than its factorization.

28619240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1242 (or 1238 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 28619240 is about 5349.6953184270. The cubic root of 28619240 is about 305.8811391355.

The spelling of 28619240 in words is "twenty-eight million, six hundred nineteen thousand, two hundred forty".