78478476 has 12 divisors (see below), whose sum is σ = 183116472. Its totient is φ = 26159488.

The previous prime is 78478471. The next prime is 78478489. The reversal of 78478476 is 67487487.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (78478471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3269925 + ... + 3269948.

It is an arithmetic number, because the mean of its divisors is an integer number (15259706).

Almost surely, 2^78478476 is an apocalyptic number.

It is an amenable number.

78478476 is an abundant number, since it is smaller than the sum of its proper divisors (104637996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78478476 is a wasteful number, since it uses less digits than its factorization.

78478476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6539880 (or 6539878 counting only the distinct ones).

The product of its digits is 2107392, while the sum is 51.

The square root of 78478476 is about 8858.8078204688. The cubic root of 78478476 is about 428.1377479004.

The spelling of 78478476 in words is "seventy-eight million, four hundred seventy-eight thousand, four hundred seventy-six".