78477486 has 32 divisors (see below), whose sum is σ = 165632640. Its totient is φ = 24719904.

The previous prime is 78477479. The next prime is 78477517. The reversal of 78477486 is 68477487.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69321 + ... + 70443.

It is an arithmetic number, because the mean of its divisors is an integer number (5176020).

Almost surely, 2^78477486 is an apocalyptic number.

78477486 is an abundant number, since it is smaller than the sum of its proper divisors (87155154).

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

78477486 is a wasteful number, since it uses less digits than its factorization.

78477486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760.

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

The square root of 78477486 is about 8858.7519436995. The cubic root of 78477486 is about 428.1359475844.

Subtracting from 78477486 its reverse (68477487), we obtain a palindrome (9999999).

The spelling of 78477486 in words is "seventy-eight million, four hundred seventy-seven thousand, four hundred eighty-six".