28035240 has 64 divisors (see below), whose sum is σ = 84490560. Its totient is φ = 7441920.

The previous prime is 28035223. The next prime is 28035263. The reversal of 28035240 is 4253082.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 28035240.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36460 + ... + 37220.

It is an arithmetic number, because the mean of its divisors is an integer number (1320165).

Almost surely, 2^28035240 is an apocalyptic number.

28035240 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 28035240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42245280).

28035240 is an abundant number, since it is smaller than the sum of its proper divisors (56455320).

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

28035240 is a wasteful number, since it uses less digits than its factorization.

28035240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082 (or 1078 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 28035240 is about 5294.8314420763. The cubic root of 28035240 is about 303.7862359182.

The spelling of 28035240 in words is "twenty-eight million, thirty-five thousand, two hundred forty".