78357316 has 6 divisors (see below), whose sum is σ = 137125310. Its totient is φ = 39178656.

The previous prime is 78357289. The next prime is 78357317. The reversal of 78357316 is 61375387.

It can be written as a sum of positive squares in only one way, i.e., 47554816 + 30802500 = 6896^2 + 5550^2 .

It is a super-2 number, since 2×78357316² = 12279737941447712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78357317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9794661 + ... + 9794668.

Almost surely, 2^78357316 is an apocalyptic number.

It is an amenable number.

78357316 is a deficient number, since it is larger than the sum of its proper divisors (58767994).

78357316 is a wasteful number, since it uses less digits than its factorization.

78357316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19589333 (or 19589331 counting only the distinct ones).

The product of its digits is 105840, while the sum is 40.

The square root of 78357316 is about 8851.9667871044. The cubic root of 78357316 is about 427.9173057693.

It can be divided in two parts, 7835 and 7316, that added together give a palindrome (15151).

The spelling of 78357316 in words is "seventy-eight million, three hundred fifty-seven thousand, three hundred sixteen".