34290640 has 20 divisors (see below), whose sum is σ = 79725924. Its totient is φ = 13716224.

The previous prime is 34290617. The next prime is 34290643. The reversal of 34290640 is 4609243.

It can be written as a sum of positive squares in 2 ways, for example, as 5817744 + 28472896 = 2412^2 + 5336^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 34290599 and 34290608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34290643) 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, 214237 + ... + 214396.

Almost surely, 2^34290640 is an apocalyptic number.

It is an amenable number.

34290640 is an abundant number, since it is smaller than the sum of its proper divisors (45435284).

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

34290640 is a wasteful number, since it uses less digits than its factorization.

34290640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428646 (or 428640 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 34290640 is about 5855.8210355167. The cubic root of 34290640 is about 324.8816610577.

Adding to 34290640 its reverse (4609243), we get a palindrome (38899883).

The spelling of 34290640 in words is "thirty-four million, two hundred ninety thousand, six hundred forty".