34640020 has 24 divisors (see below), whose sum is σ = 75091968. Its totient is φ = 13408800.

The previous prime is 34640003. The next prime is 34640027. The reversal of 34640020 is 2004643.

It is a self number, because there is not a number n which added to its sum of digits gives 34640020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34640027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27316 + ... + 28555.

It is an arithmetic number, because the mean of its divisors is an integer number (3128832).

Almost surely, 2^34640020 is an apocalyptic number.

It is an amenable number.

34640020 is an abundant number, since it is smaller than the sum of its proper divisors (40451948).

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

34640020 is a wasteful number, since it uses less digits than its factorization.

34640020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55911 (or 55909 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 34640020 is about 5885.5772868938. The cubic root of 34640020 is about 325.9813180106.

Adding to 34640020 its reverse (2004643), we get a palindrome (36644663).

The spelling of 34640020 in words is "thirty-four million, six hundred forty thousand, twenty".