78440230 has 32 divisors (see below), whose sum is σ = 159003648. Its totient is φ = 27602400.

The previous prime is 78440221. The next prime is 78440231. The reversal of 78440230 is 3204487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78440231) 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, 8092 + ... + 14911.

It is an arithmetic number, because the mean of its divisors is an integer number (4968864).

Almost surely, 2^78440230 is an apocalyptic number.

78440230 is an abundant number, since it is smaller than the sum of its proper divisors (80563418).

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

78440230 is a wasteful number, since it uses less digits than its factorization.

78440230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23052.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 78440230 is about 8856.6489147984. The cubic root of 78440230 is about 428.0681865044.

It can be divided in two parts, 784 and 40230, that added together give a palindrome (41014).

The spelling of 78440230 in words is "seventy-eight million, four hundred forty thousand, two hundred thirty".