78303274 has 24 divisors (see below), whose sum is σ = 137206980. Its totient is φ = 33417216.

The previous prime is 78303271. The next prime is 78303283. The reversal of 78303274 is 47230387.

It can be written as a sum of positive squares in 2 ways, for example, as 76440049 + 1863225 = 8743^2 + 1365^2 .

It is a super-2 number, since 2×78303274² = 12262805438238152, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (78303271) 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 in 11 ways as a sum of consecutive naturals, for example, 23632 + ... + 26740.

Almost surely, 2^78303274 is an apocalyptic number.

78303274 is a deficient number, since it is larger than the sum of its proper divisors (58903706).

78303274 is a wasteful number, since it uses less digits than its factorization.

78303274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3382 (or 3375 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 78303274 is about 8848.9137186437. The cubic root of 78303274 is about 427.8189068505.

The spelling of 78303274 in words is "seventy-eight million, three hundred three thousand, two hundred seventy-four".