78314506 has 4 divisors (see below), whose sum is σ = 117471762. Its totient is φ = 39157252.

The previous prime is 78314503. The next prime is 78314513. The reversal of 78314506 is 60541387.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 70140625 + 8173881 = 8375^2 + 2859^2 .

It is a super-2 number, since 2×78314506² = 12266323700048072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78314501) by changing a digit.

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, 19578625 + ... + 19578628.

Almost surely, 2^78314506 is an apocalyptic number.

78314506 is a deficient number, since it is larger than the sum of its proper divisors (39157256).

78314506 is a wasteful number, since it uses less digits than its factorization.

78314506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39157255.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 78314506 is about 8849.5483500572. The cubic root of 78314506 is about 427.8393616454.

The spelling of 78314506 in words is "seventy-eight million, three hundred fourteen thousand, five hundred six".