34378781 has 8 divisors (see below), whose sum is σ = 34831104. Its totient is φ = 33929280.

The previous prime is 34378763. The next prime is 34378823. The reversal of 34378781 is 18787343.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 34378781 - 2¹⁴ = 34362397 is a prime.

It is a super-2 number, since 2×34378781² = 2363801166091922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34378081) 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, 34196 + ... + 35186.

It is an arithmetic number, because the mean of its divisors is an integer number (4353888).

Almost surely, 2^34378781 is an apocalyptic number.

It is an amenable number.

34378781 is a deficient number, since it is larger than the sum of its proper divisors (452323).

34378781 is a wasteful number, since it uses less digits than its factorization.

34378781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411.

The product of its digits is 112896, while the sum is 41.

The square root of 34378781 is about 5863.3421356765. The cubic root of 34378781 is about 325.1597825758.

The spelling of 34378781 in words is "thirty-four million, three hundred seventy-eight thousand, seven hundred eighty-one".