34328781 has 6 divisors (see below), whose sum is σ = 49586030. Its totient is φ = 22885848.

The previous prime is 34328773. The next prime is 34328783. The reversal of 34328781 is 18782343.

It can be written as a sum of positive squares in only one way, i.e., 34327881 + 900 = 5859^2 + 30^2 .

It is not a de Polignac number, because 34328781 - 2³ = 34328773 is a prime.

It is a super-2 number, since 2×34328781² = 2356930409891922, 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 (34328783) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1907146 + ... + 1907163.

Almost surely, 2^34328781 is an apocalyptic number.

It is an amenable number.

34328781 is a deficient number, since it is larger than the sum of its proper divisors (15257249).

34328781 is a wasteful number, since it uses less digits than its factorization.

34328781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3814315 (or 3814312 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 34328781 is about 5859.0768044121. The cubic root of 34328781 is about 325.0020702038.

The spelling of 34328781 in words is "thirty-four million, three hundred twenty-eight thousand, seven hundred eighty-one".