78419885 has 8 divisors (see below), whose sum is σ = 95393400. Its totient is φ = 61876224.

The previous prime is 78419867. The next prime is 78419911. The reversal of 78419885 is 58891487.

It can be written as a sum of positive squares in 4 ways, for example, as 26853124 + 51566761 = 5182^2 + 7181^2 .

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 78419885 - 2⁸ = 78419629 is a prime.

It is a super-2 number, since 2×78419885² = 12299356726826450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107060 + ... + 107789.

It is an arithmetic number, because the mean of its divisors is an integer number (11924175).

Almost surely, 2^78419885 is an apocalyptic number.

It is an amenable number.

78419885 is a deficient number, since it is larger than the sum of its proper divisors (16973515).

78419885 is a wasteful number, since it uses less digits than its factorization.

78419885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214927.

The product of its digits is 645120, while the sum is 50.

The square root of 78419885 is about 8855.5002681949. The cubic root of 78419885 is about 428.0311740329.

It can be divided in two parts, 7841988 and 5, that multiplied together give a triangular number (39209940 = T₈₈₅₅).

The spelling of 78419885 in words is "seventy-eight million, four hundred nineteen thousand, eight hundred eighty-five".