3534640 has 80 divisors (see below), whose sum is σ = 9160128. Its totient is φ = 1261568.

The previous prime is 3534613. The next prime is 3534659. The reversal of 3534640 is 464353.

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31224 + ... + 31336.

Almost surely, 2^3534640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3534640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4580064).

3534640 is an abundant number, since it is smaller than the sum of its proper divisors (5625488).

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

3534640 is a wasteful number, since it uses less digits than its factorization.

3534640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 3534640 is about 1880.0638287037. The cubic root of 3534640 is about 152.3286977326.

Adding to 3534640 its reverse (464353), we get a palindrome (3998993).

The spelling of 3534640 in words is "three million, five hundred thirty-four thousand, six hundred forty".