78440301 has 6 divisors (see below), whose sum is σ = 113302670. Its totient is φ = 52293528.

The previous prime is 78440291. The next prime is 78440357. The reversal of 78440301 is 10304487.

It can be written as a sum of positive squares in only one way, i.e., 54908100 + 23532201 = 7410^2 + 4851^2 .

It is not a de Polignac number, because 78440301 - 2⁵ = 78440269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78440381) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4357786 + ... + 4357803.

Almost surely, 2^78440301 is an apocalyptic number.

It is an amenable number.

78440301 is a deficient number, since it is larger than the sum of its proper divisors (34862369).

78440301 is a wasteful number, since it uses less digits than its factorization.

78440301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8715595 (or 8715592 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 78440301 is about 8856.6529230856. The cubic root of 78440301 is about 428.0683156593.

Adding to 78440301 its reverse (10304487), we get a palindrome (88744788).

The spelling of 78440301 in words is "seventy-eight million, four hundred forty thousand, three hundred one".