3500028 has 144 divisors (see below), whose sum is σ = 11531520. Its totient is φ = 870912.

The previous prime is 3500023. The next prime is 3500033. The reversal of 3500028 is 8200053.

It is an interprime number because it is at equal distance from previous prime (3500023) and next prime (3500033).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3500023) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 81375 + ... + 81417.

It is an arithmetic number, because the mean of its divisors is an integer number (80080).

Almost surely, 2^3500028 is an apocalyptic number.

3500028 is a gapful number since it is divisible by the number (38) 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 3500028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5765760).

3500028 is an abundant number, since it is smaller than the sum of its proper divisors (8031492).

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

3500028 is a wasteful number, since it uses less digits than its factorization.

3500028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 91 counting only the distinct ones).

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

The square root of 3500028 is about 1870.8361766868. The cubic root of 3500028 is about 151.8298534712.

The spelling of 3500028 in words is "three million, five hundred thousand, twenty-eight".