28620234 has 48 divisors (see below), whose sum is σ = 65662272. Its totient is φ = 8990784.

The previous prime is 28620217. The next prime is 28620247. The reversal of 28620234 is 43202682.

28620234 is a `hidden beast` number, since 2 + 8 + 620 + 2 + 34 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 28620198 and 28620207.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29749 + ... + 30695.

It is an arithmetic number, because the mean of its divisors is an integer number (1367964).

Almost surely, 2^28620234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28620234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32831136).

28620234 is an abundant number, since it is smaller than the sum of its proper divisors (37042038).

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

28620234 is a wasteful number, since it uses less digits than its factorization.

28620234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051 (or 1048 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 28620234 is about 5349.7882201074. The cubic root of 28620234 is about 305.8846803701.

The spelling of 28620234 in words is "twenty-eight million, six hundred twenty thousand, two hundred thirty-four".