34778919 has 32 divisors (see below), whose sum is σ = 54706176. Its totient is φ = 19242720.

The previous prime is 34778903. The next prime is 34778941. The reversal of 34778919 is 91987743.

34778919 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 34778919 - 2⁴ = 34778903 is a prime.

It is a super-2 number, since 2×34778919² = 2419146413617122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34778119) 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 31 ways as a sum of consecutive naturals, for example, 164724 + ... + 164934.

It is an arithmetic number, because the mean of its divisors is an integer number (1709568).

Almost surely, 2^34778919 is an apocalyptic number.

34778919 is a deficient number, since it is larger than the sum of its proper divisors (19927257).

34778919 is a wasteful number, since it uses less digits than its factorization.

34778919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435.

The product of its digits is 381024, while the sum is 48.

The square root of 34778919 is about 5897.3654287317. The cubic root of 34778919 is about 326.4164418410.

The spelling of 34778919 in words is "thirty-four million, seven hundred seventy-eight thousand, nine hundred nineteen".