78434741 has 18 divisors (see below), whose sum is σ = 100296630. Its totient is φ = 61113360.

The previous prime is 78434737. The next prime is 78434747. The reversal of 78434741 is 14743487.

It can be written as a sum of positive squares in only one way, i.e., 78411025 + 23716 = 8855^2 + 154^2 .

It is not a de Polignac number, because 78434741 - 2² = 78434737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 78434695 and 78434704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78434747) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 686 + ... + 12543.

It is an arithmetic number, because the mean of its divisors is an integer number (5572035).

Almost surely, 2^78434741 is an apocalyptic number.

It is an amenable number.

78434741 is a deficient number, since it is larger than the sum of its proper divisors (21861889).

78434741 is a wasteful number, since it uses less digits than its factorization.

78434741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13265 (or 13247 counting only the distinct ones).

The product of its digits is 75264, while the sum is 38.

The square root of 78434741 is about 8856.3390291926. The cubic root of 78434741 is about 428.0582013174.

The spelling of 78434741 in words is "seventy-eight million, four hundred thirty-four thousand, seven hundred forty-one".