78472905 has 16 divisors (see below), whose sum is σ = 143493504. Its totient is φ = 35873280.

The previous prime is 78472897. The next prime is 78472909. The reversal of 78472905 is 50927487.

It is not a de Polignac number, because 78472905 - 2³ = 78472897 is a prime.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (78472909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 373576 + ... + 373785.

It is an arithmetic number, because the mean of its divisors is an integer number (8968344).

Almost surely, 2^78472905 is an apocalyptic number.

It is an amenable number.

78472905 is a deficient number, since it is larger than the sum of its proper divisors (65020599).

78472905 is a wasteful number, since it uses less digits than its factorization.

78472905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747376.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 78472905 is about 8858.4933820600. The cubic root of 78472905 is about 428.1276168345.

The spelling of 78472905 in words is "seventy-eight million, four hundred seventy-two thousand, nine hundred five".