78293408 has 12 divisors (see below), whose sum is σ = 154140210. Its totient is φ = 39146688.

The previous prime is 78293401. The next prime is 78293419. The reversal of 78293408 is 80439287.

It can be written as a sum of positive squares in only one way, i.e., 53173264 + 25120144 = 7292^2 + 5012^2 .

It is a super-2 number, since 2×78293408² = 12259715472508928, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78293401) by changing a digit.

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 as a sum of consecutive naturals, namely, 1223303 + ... + 1223366.

Almost surely, 2^78293408 is an apocalyptic number.

It is an amenable number.

78293408 is a deficient number, since it is larger than the sum of its proper divisors (75846802).

78293408 is a wasteful number, since it uses less digits than its factorization.

78293408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2446679 (or 2446671 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 78293408 is about 8848.3562315268. The cubic root of 78293408 is about 427.8009380888.

The spelling of 78293408 in words is "seventy-eight million, two hundred ninety-three thousand, four hundred eight".