78414405 has 16 divisors (see below), whose sum is σ = 129790080. Its totient is φ = 40378688.

The previous prime is 78414403. The next prime is 78414419. The reversal of 78414405 is 50441487.

It is a cyclic number.

It is not a de Polignac number, because 78414405 - 2¹ = 78414403 is a prime.

It is a super-2 number, since 2×78414405² = 12297637823008050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78414403) 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, 89697 + ... + 90566.

It is an arithmetic number, because the mean of its divisors is an integer number (8111880).

Almost surely, 2^78414405 is an apocalyptic number.

It is an amenable number.

78414405 is a deficient number, since it is larger than the sum of its proper divisors (51375675).

78414405 is a wasteful number, since it uses less digits than its factorization.

78414405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180300.

The product of its (nonzero) digits is 17920, while the sum is 33.

The square root of 78414405 is about 8855.1908505689. The cubic root of 78414405 is about 428.0212034943.

It can be divided in two parts, 7841 and 4405, that added together give a triangular number (12246 = T₁₅₆).

The spelling of 78414405 in words is "seventy-eight million, four hundred fourteen thousand, four hundred five".