28782567 has 16 divisors (see below), whose sum is σ = 46517760. Its totient is φ = 17443800.

The previous prime is 28782553. The next prime is 28782571. The reversal of 28782567 is 76528782.

28782567 is a `hidden beast` number, since 2 + 8 + 7 + 82 + 567 = 666.

It is not a de Polignac number, because 28782567 - 2⁶ = 28782503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28782527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48159 + ... + 48752.

It is an arithmetic number, because the mean of its divisors is an integer number (2907360).

Almost surely, 2^28782567 is an apocalyptic number.

28782567 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28782567 is a deficient number, since it is larger than the sum of its proper divisors (17735193).

28782567 is a wasteful number, since it uses less digits than its factorization.

28782567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96931 (or 96925 counting only the distinct ones).

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

The square root of 28782567 is about 5364.9386762572. The cubic root of 28782567 is about 306.4619129171.

It can be divided in two parts, 2878 and 2567, that added together give a palindrome (5445).

The spelling of 28782567 in words is "twenty-eight million, seven hundred eighty-two thousand, five hundred sixty-seven".