78419530 has 32 divisors (see below), whose sum is σ = 165078144. Its totient is φ = 26260416.

The previous prime is 78419507. The next prime is 78419533. The reversal of 78419530 is 3591487.

It is a super-2 number, since 2×78419530² = 12299245370841800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 78419530.

It is not an unprimeable number, because it can be changed into a prime (78419533) 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, 10017 + ... + 16036.

It is an arithmetic number, because the mean of its divisors is an integer number (5158692).

Almost surely, 2^78419530 is an apocalyptic number.

78419530 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78419530 is an abundant number, since it is smaller than the sum of its proper divisors (86658614).

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

78419530 is a wasteful number, since it uses less digits than its factorization.

78419530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26110.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 78419530 is about 8855.4802241324. The cubic root of 78419530 is about 428.0305281453.

It can be divided in two parts, 7841 and 9530, that added together give a palindrome (17371).

The spelling of 78419530 in words is "seventy-eight million, four hundred nineteen thousand, five hundred thirty".