28787562 has 40 divisors (see below), whose sum is σ = 68306436. Its totient is φ = 9030528.

The previous prime is 28787557. The next prime is 28787567. The reversal of 28787562 is 26578782.

28787562 is a `hidden beast` number, since 2 + 8 + 7 + 87 + 562 = 666.

It is an interprime number because it is at equal distance from previous prime (28787557) and next prime (28787567).

It can be written as a sum of positive squares in 2 ways, for example, as 22838841 + 5948721 = 4779^2 + 2439^2 .

It is not an unprimeable number, because it can be changed into a prime (28787567) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2473 + ... + 7980.

Almost surely, 2^28787562 is an apocalyptic number.

28787562 is an abundant number, since it is smaller than the sum of its proper divisors (39518874).

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

28787562 is a wasteful number, since it uses less digits than its factorization.

28787562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10484 (or 10475 counting only the distinct ones).

The product of its digits is 376320, while the sum is 45.

The square root of 28787562 is about 5365.4041786244. The cubic root of 28787562 is about 306.4796399520.

It can be divided in two parts, 2878 and 7562, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 28787562 in words is "twenty-eight million, seven hundred eighty-seven thousand, five hundred sixty-two".