78078573 has 12 divisors (see below), whose sum is σ = 116957568. Its totient is φ = 52052220.

The previous prime is 78078571. The next prime is 78078577. The reversal of 78078573 is 37587087.

78078573 is a `hidden beast` number, since 7 + 8 + 0 + 78 + 573 = 666.

It is not a de Polignac number, because 78078573 - 2¹ = 78078571 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78078571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160413 + ... + 160898.

It is an arithmetic number, because the mean of its divisors is an integer number (9746464).

Almost surely, 2^78078573 is an apocalyptic number.

It is an amenable number.

78078573 is a deficient number, since it is larger than the sum of its proper divisors (38878995).

78078573 is an equidigital number, since it uses as much as digits as its factorization.

78078573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321326 (or 321314 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 45.

The square root of 78078573 is about 8836.2080668124. The cubic root of 78078573 is about 427.4092882323.

The spelling of 78078573 in words is "seventy-eight million, seventy-eight thousand, five hundred seventy-three".