78051447 has 24 divisors (see below), whose sum is σ = 115082240. Its totient is φ = 50965200.

The previous prime is 78051439. The next prime is 78051461. The reversal of 78051447 is 74415087.

It is not a de Polignac number, because 78051447 - 2³ = 78051439 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 (78051647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106998 + ... + 107724.

Almost surely, 2^78051447 is an apocalyptic number.

78051447 is a deficient number, since it is larger than the sum of its proper divisors (37030793).

78051447 is a wasteful number, since it uses less digits than its factorization.

78051447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963 (or 960 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 36.

The square root of 78051447 is about 8834.6729990419. The cubic root of 78051447 is about 427.3597857597.

The spelling of 78051447 in words is "seventy-eight million, fifty-one thousand, four hundred forty-seven".