34478781 has 8 divisors (see below), whose sum is σ = 46525920. Its totient is φ = 22708752.

The previous prime is 34478729. The next prime is 34478791. The reversal of 34478781 is 18787443.

34478781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 34478781 - 2²² = 30284477 is a prime.

It is a super-2 number, since 2×34478781² = 2377572678491922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34478791) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 68986 + ... + 69483.

It is an arithmetic number, because the mean of its divisors is an integer number (5815740).

Almost surely, 2^34478781 is an apocalyptic number.

It is an amenable number.

34478781 is a deficient number, since it is larger than the sum of its proper divisors (12047139).

34478781 is a wasteful number, since it uses less digits than its factorization.

34478781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138555.

The product of its digits is 150528, while the sum is 42.

The square root of 34478781 is about 5871.8635031819. The cubic root of 34478781 is about 325.4747491626.

The spelling of 34478781 in words is "thirty-four million, four hundred seventy-eight thousand, seven hundred eighty-one".