78305296 has 10 divisors (see below), whose sum is σ = 151716542. Its totient is φ = 39152640.

The previous prime is 78305263. The next prime is 78305303. The reversal of 78305296 is 69250387.

It can be written as a sum of positive squares in only one way, i.e., 78074896 + 230400 = 8836^2 + 480^2 .

It is a super-2 number, since 2×78305296² = 12263438763295232, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2447025 + ... + 2447056.

Almost surely, 2^78305296 is an apocalyptic number.

It is an amenable number.

78305296 is a deficient number, since it is larger than the sum of its proper divisors (73411246).

78305296 is a wasteful number, since it uses less digits than its factorization.

78305296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4894089 (or 4894083 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 78305296 is about 8849.0279692179. The cubic root of 78305296 is about 427.8225892950.

The spelling of 78305296 in words is "seventy-eight million, three hundred five thousand, two hundred ninety-six".