78311608 has 8 divisors (see below), whose sum is σ = 146834280. Its totient is φ = 39155800.

The previous prime is 78311593. The next prime is 78311657. The reversal of 78311608 is 80611387.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×78311608² = 12265415895091328, 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 (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4894468 + ... + 4894483.

It is an arithmetic number, because the mean of its divisors is an integer number (18354285).

Almost surely, 2^78311608 is an apocalyptic number.

It is an amenable number.

78311608 is a deficient number, since it is larger than the sum of its proper divisors (68522672).

78311608 is a wasteful number, since it uses less digits than its factorization.

78311608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9788957 (or 9788953 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 78311608 is about 8849.3846113727. The cubic root of 78311608 is about 427.8340842333.

The spelling of 78311608 in words is "seventy-eight million, three hundred eleven thousand, six hundred eight".