3499840 has 28 divisors (see below), whose sum is σ = 8334756. Its totient is φ = 1399808.

The previous prime is 3499831. The next prime is 3499843. The reversal of 3499840 is 489943.

It can be written as a sum of positive squares in 2 ways, for example, as 2483776 + 1016064 = 1576^2 + 1008^2 .

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 3499840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3499843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5149 + ... + 5788.

Almost surely, 2^3499840 is an apocalyptic number.

It is an amenable number.

3499840 is an abundant number, since it is smaller than the sum of its proper divisors (4834916).

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

3499840 is a wasteful number, since it uses less digits than its factorization.

3499840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10954 (or 10944 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 3499840 is about 1870.7859310995. The cubic root of 3499840 is about 151.8271349669.

The spelling of 3499840 in words is "three million, four hundred ninety-nine thousand, eight hundred forty".