34512820 has 12 divisors (see below), whose sum is σ = 72476964. Its totient is φ = 13805120.

The previous prime is 34512773. The next prime is 34512833. The reversal of 34512820 is 2821543.

It can be written as a sum of positive squares in 2 ways, for example, as 6697744 + 27815076 = 2588^2 + 5274^2 .

It is a super-2 number, since 2×34512820² = 2382269488704800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 862801 + ... + 862840.

It is an arithmetic number, because the mean of its divisors is an integer number (6039747).

Almost surely, 2^34512820 is an apocalyptic number.

It is an amenable number.

34512820 is an abundant number, since it is smaller than the sum of its proper divisors (37964144).

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

34512820 is a wasteful number, since it uses less digits than its factorization.

34512820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1725650 (or 1725648 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 34512820 is about 5874.7612717454. The cubic root of 34512820 is about 325.5818216946.

The spelling of 34512820 in words is "thirty-four million, five hundred twelve thousand, eight hundred twenty".