78429441 has 4 divisors (see below), whose sum is σ = 104572592. Its totient is φ = 52286292.

The previous prime is 78429437. The next prime is 78429451. The reversal of 78429441 is 14492487.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 78429441 - 2² = 78429437 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78429441.

It is not an unprimeable number, because it can be changed into a prime (78429451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13071571 + ... + 13071576.

It is an arithmetic number, because the mean of its divisors is an integer number (26143148).

Almost surely, 2^78429441 is an apocalyptic number.

It is an amenable number.

78429441 is a deficient number, since it is larger than the sum of its proper divisors (26143151).

78429441 is a wasteful number, since it uses less digits than its factorization.

78429441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26143150.

The product of its digits is 64512, while the sum is 39.

The square root of 78429441 is about 8856.0398034336. The cubic root of 78429441 is about 428.0485595033.

The spelling of 78429441 in words is "seventy-eight million, four hundred twenty-nine thousand, four hundred forty-one".