34540240 has 80 divisors (see below), whose sum is σ = 94315392. Its totient is φ = 11515392.

The previous prime is 34540237. The next prime is 34540241. The reversal of 34540240 is 4204543.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34540241) 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, 19887 + ... + 21553.

Almost surely, 2^34540240 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 34540240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47157696).

34540240 is an abundant number, since it is smaller than the sum of its proper divisors (59775152).

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

34540240 is a wasteful number, since it uses less digits than its factorization.

34540240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1724 (or 1718 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 34540240 is about 5877.0945202540. The cubic root of 34540240 is about 325.6680224198.

Adding to 34540240 its reverse (4204543), we get a palindrome (38744783).

The spelling of 34540240 in words is "thirty-four million, five hundred forty thousand, two hundred forty".