28620344 has 8 divisors (see below), whose sum is σ = 53663160. Its totient is φ = 14310168.

The previous prime is 28620343. The next prime is 28620373. The reversal of 28620344 is 44302682.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28620343) 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 as a sum of consecutive naturals, namely, 1788764 + ... + 1788779.

It is an arithmetic number, because the mean of its divisors is an integer number (6707895).

Almost surely, 2^28620344 is an apocalyptic number.

It is an amenable number.

28620344 is a deficient number, since it is larger than the sum of its proper divisors (25042816).

28620344 is a wasteful number, since it uses less digits than its factorization.

28620344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3577549 (or 3577545 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 28620344 is about 5349.7985008783. The cubic root of 28620344 is about 305.8850722522.

The spelling of 28620344 in words is "twenty-eight million, six hundred twenty thousand, three hundred forty-four".