34378840 has 32 divisors (see below), whose sum is σ = 77651280. Its totient is φ = 13698432.

The previous prime is 34378823. The next prime is 34378843. The reversal of 34378840 is 4887343.

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 34378840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34378843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9802 + ... + 12838.

Almost surely, 2^34378840 is an apocalyptic number.

It is an amenable number.

34378840 is an abundant number, since it is smaller than the sum of its proper divisors (43272440).

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

34378840 is a wasteful number, since it uses less digits than its factorization.

34378840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3331 (or 3327 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 34378840 is about 5863.3471669346. The cubic root of 34378840 is about 325.1599685861.

The spelling of 34378840 in words is "thirty-four million, three hundred seventy-eight thousand, eight hundred forty".