78071458 has 16 divisors (see below), whose sum is σ = 119520576. Its totient is φ = 38238480.

The previous prime is 78071447. The next prime is 78071459. The reversal of 78071458 is 85417087.

It is a self number, because there is not a number n which added to its sum of digits gives 78071458.

It is not an unprimeable number, because it can be changed into a prime (78071459) 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, 21460 + ... + 24832.

It is an arithmetic number, because the mean of its divisors is an integer number (7470036).

Almost surely, 2^78071458 is an apocalyptic number.

78071458 is a deficient number, since it is larger than the sum of its proper divisors (41449118).

78071458 is a wasteful number, since it uses less digits than its factorization.

78071458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3609.

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 78071458 is about 8835.8054528153. The cubic root of 78071458 is about 427.3963051165.

The spelling of 78071458 in words is "seventy-eight million, seventy-one thousand, four hundred fifty-eight".