28534620 has 48 divisors (see below), whose sum is σ = 80388000. Its totient is φ = 7562496.

The previous prime is 28534613. The next prime is 28534643. The reversal of 28534620 is 2643582.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9006 + ... + 11754.

It is an arithmetic number, because the mean of its divisors is an integer number (1674750).

Almost surely, 2^28534620 is an apocalyptic number.

28534620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28534620 is an abundant number, since it is smaller than the sum of its proper divisors (51853380).

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

28534620 is a wasteful number, since it uses less digits than its factorization.

28534620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2934 (or 2932 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 28534620 is about 5341.7806020090. The cubic root of 28534620 is about 305.5793699468.

The spelling of 28534620 in words is "twenty-eight million, five hundred thirty-four thousand, six hundred twenty".