3500280 has 128 divisors (see below), whose sum is σ = 13363200. Its totient is φ = 798336.

The previous prime is 3500269. The next prime is 3500297. The reversal of 3500280 is 820053.

3500280 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

3500280 is strictly pandigital in base 8.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7329 + ... + 7791.

It is an arithmetic number, because the mean of its divisors is an integer number (104400).

Almost surely, 2^3500280 is an apocalyptic number.

3500280 is a gapful number since it is divisible by the number (30) 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 3500280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6681600).

3500280 is an abundant number, since it is smaller than the sum of its proper divisors (9862920).

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

3500280 is a wasteful number, since it uses less digits than its factorization.

3500280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490 (or 480 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 3500280 is about 1870.9035250381. The cubic root of 3500280 is about 151.8334972711.

The spelling of 3500280 in words is "three million, five hundred thousand, two hundred eighty".