78311084 has 48 divisors (see below), whose sum is σ = 152570880. Its totient is φ = 35017920.

The previous prime is 78311039. The next prime is 78311089. The reversal of 78311084 is 48011387.

It is a super-2 number, since 2×78311084² = 12265251754510112, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78311084.

It is not an unprimeable number, because it can be changed into a prime (78311089) 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, 100922 + ... + 101694.

It is an arithmetic number, because the mean of its divisors is an integer number (3178560).

Almost surely, 2^78311084 is an apocalyptic number.

It is an amenable number.

78311084 is a deficient number, since it is larger than the sum of its proper divisors (74259796).

78311084 is a wasteful number, since it uses less digits than its factorization.

78311084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 78311084 is about 8849.3550047447. The cubic root of 78311084 is about 427.8331299875.

The spelling of 78311084 in words is "seventy-eight million, three hundred eleven thousand, eighty-four".