28734570 has 48 divisors (see below), whose sum is σ = 76737960. Its totient is φ = 7454592.

The previous prime is 28734569. The next prime is 28734571. The reversal of 28734570 is 7543782.

28734570 is a `hidden beast` number, since 2 + 87 + 3 + 4 + 570 = 666.

It is an interprime number because it is at equal distance from previous prime (28734569) and next prime (28734571).

It can be written as a sum of positive squares in 4 ways, for example, as 28483569 + 251001 = 5337^2 + 501^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28734571) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 985 + ... + 7644.

Almost surely, 2^28734570 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28734570, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38368980).

28734570 is an abundant number, since it is smaller than the sum of its proper divisors (48003390).

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

28734570 is a wasteful number, since it uses less digits than its factorization.

28734570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8679 (or 8676 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 28734570 is about 5360.4635993541. The cubic root of 28734570 is about 306.2914690478.

The spelling of 28734570 in words is "twenty-eight million, seven hundred thirty-four thousand, five hundred seventy".