3520140 has 48 divisors (see below), whose sum is σ = 10616928. Its totient is φ = 866304.

The previous prime is 3520093. The next prime is 3520141. The reversal of 3520140 is 410253.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (3520141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1477 + ... + 3036.

It is an arithmetic number, because the mean of its divisors is an integer number (221186).

Almost surely, 2^3520140 is an apocalyptic number.

3520140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3520140 is an abundant number, since it is smaller than the sum of its proper divisors (7096788).

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

3520140 is a wasteful number, since it uses less digits than its factorization.

3520140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4538 (or 4536 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 3520140 is about 1876.2036136838. The cubic root of 3520140 is about 152.1201151209.

Adding to 3520140 its reverse (410253), we get a palindrome (3930393).

The spelling of 3520140 in words is "three million, five hundred twenty thousand, one hundred forty".