78073449 has 8 divisors (see below), whose sum is σ = 104173632. Its totient is φ = 52011120.

The previous prime is 78073433. The next prime is 78073453. The reversal of 78073449 is 94437087.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78073449 - 2⁴ = 78073433 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 78073449.

It is not an unprimeable number, because it can be changed into a prime (78073459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4237 + ... + 13194.

It is an arithmetic number, because the mean of its divisors is an integer number (13021704).

Almost surely, 2^78073449 is an apocalyptic number.

It is an amenable number.

78073449 is a deficient number, since it is larger than the sum of its proper divisors (26100183).

78073449 is a wasteful number, since it uses less digits than its factorization.

78073449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18927.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 78073449 is about 8835.9181186790. The cubic root of 78073449 is about 427.3999382787.

The spelling of 78073449 in words is "seventy-eight million, seventy-three thousand, four hundred forty-nine".