28870415787 has 16 divisors (see below), whose sum is σ = 40456523520. Its totient is φ = 18277667232.

The previous prime is 28870415713. The next prime is 28870415789. The reversal of 28870415787 is 78751407882.

It is not a de Polignac number, because 28870415787 - 2¹⁰ = 28870414763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28870415789) 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, 1495488 + ... + 1514669.

It is an arithmetic number, because the mean of its divisors is an integer number (2528532720).

Almost surely, 2^28870415787 is an apocalyptic number.

28870415787 is a deficient number, since it is larger than the sum of its proper divisors (11586107733).

28870415787 is a wasteful number, since it uses less digits than its factorization.

28870415787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3010322.

The product of its (nonzero) digits is 7024640, while the sum is 57.

The spelling of 28870415787 in words is "twenty-eight billion, eight hundred seventy million, four hundred fifteen thousand, seven hundred eighty-seven".