34228720 has 20 divisors (see below), whose sum is σ = 79581960. Its totient is φ = 13691456.

The previous prime is 34228697. The next prime is 34228757. The reversal of 34228720 is 2782243.

It is a tau number, because it is divible by the number of its divisors (20).

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, 213850 + ... + 214009.

It is an arithmetic number, because the mean of its divisors is an integer number (3979098).

Almost surely, 2^34228720 is an apocalyptic number.

It is an amenable number.

34228720 is an abundant number, since it is smaller than the sum of its proper divisors (45353240).

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

34228720 is a wasteful number, since it uses less digits than its factorization.

34228720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427872 (or 427866 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 34228720 is about 5850.5315997779. The cubic root of 34228720 is about 324.6859925690.

The spelling of 34228720 in words is "thirty-four million, two hundred twenty-eight thousand, seven hundred twenty".