85278787 has 8 divisors (see below), whose sum is σ = 93515760. Its totient is φ = 77122560.

The previous prime is 85278769. The next prime is 85278797. The reversal of 85278787 is 78787258.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85278787 - 2¹⁵ = 85246019 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85278757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17962 + ... + 22207.

It is an arithmetic number, because the mean of its divisors is an integer number (11689470).

Almost surely, 2^85278787 is an apocalyptic number.

85278787 is a deficient number, since it is larger than the sum of its proper divisors (8236973).

85278787 is a wasteful number, since it uses less digits than its factorization.

85278787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40373.

The product of its digits is 1756160, while the sum is 52.

The square root of 85278787 is about 9234.6514281807. The cubic root of 85278787 is about 440.1631402620.

It can be divided in two parts, 85 and 278787, that added together give a palindrome (278872).

The spelling of 85278787 in words is "eighty-five million, two hundred seventy-eight thousand, seven hundred eighty-seven".