78382478 has 16 divisors (see below), whose sum is σ = 125893440. Its totient is φ = 36470016.

The previous prime is 78382453. The next prime is 78382487. The reversal of 78382478 is 87428387.

It is a happy number.

It is a super-2 number, since 2×78382478² = 12287625714840968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9926 + ... + 15977.

It is an arithmetic number, because the mean of its divisors is an integer number (7868340).

Almost surely, 2^78382478 is an apocalyptic number.

78382478 is a deficient number, since it is larger than the sum of its proper divisors (47510962).

78382478 is a wasteful number, since it uses less digits than its factorization.

78382478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26011.

The product of its digits is 602112, while the sum is 47.

The square root of 78382478 is about 8853.3879390886. The cubic root of 78382478 is about 427.9631049513.

The spelling of 78382478 in words is "seventy-eight million, three hundred eighty-two thousand, four hundred seventy-eight".