78536850 has 48 divisors (see below), whose sum is σ = 222598848. Its totient is φ = 17951040.

The previous prime is 78536849. The next prime is 78536851. The reversal of 78536850 is 5863587.

78536850 = 428² + 429² + ... + 679².

It is an interprime number because it is at equal distance from previous prime (78536849) and next prime (78536851).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78536851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36349 + ... + 38448.

It is an arithmetic number, because the mean of its divisors is an integer number (4637476).

Almost surely, 2^78536850 is an apocalyptic number.

78536850 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78536850 is an abundant number, since it is smaller than the sum of its proper divisors (144061998).

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

78536850 is a wasteful number, since it uses less digits than its factorization.

78536850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74819 (or 74814 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 78536850 is about 8862.1018951488. The cubic root of 78536850 is about 428.2438743194.

The spelling of 78536850 in words is "seventy-eight million, five hundred thirty-six thousand, eight hundred fifty".