28274652 has 144 divisors (see below), whose sum is σ = 87272640. Its totient is φ = 7547904.

The previous prime is 28274651. The next prime is 28274657. The reversal of 28274652 is 25647282.

It is a super-2 number, since 2×28274652² = 1598911891442208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28274651) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 387288 + ... + 387360.

It is an arithmetic number, because the mean of its divisors is an integer number (606060).

Almost surely, 2^28274652 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28274652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43636320).

28274652 is an abundant number, since it is smaller than the sum of its proper divisors (58997988).

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

28274652 is a wasteful number, since it uses less digits than its factorization.

28274652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 167 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 28274652 is about 5317.3914657471. The cubic root of 28274652 is about 304.6485318053.

The spelling of 28274652 in words is "twenty-eight million, two hundred seventy-four thousand, six hundred fifty-two".