78740467 has 4 divisors (see below), whose sum is σ = 84797440. Its totient is φ = 72683496.

The previous prime is 78740461. The next prime is 78740479. The reversal of 78740467 is 76404787.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78740467 is a prime.

It is a super-2 number, since 2×78740467² = 12400122286756178, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78740461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3028467 + ... + 3028492.

It is an arithmetic number, because the mean of its divisors is an integer number (21199360).

Almost surely, 2^78740467 is an apocalyptic number.

78740467 is a deficient number, since it is larger than the sum of its proper divisors (6056973).

78740467 is a wasteful number, since it uses less digits than its factorization.

78740467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6056972.

The product of its (nonzero) digits is 263424, while the sum is 43.

The square root of 78740467 is about 8873.5825346925. The cubic root of 78740467 is about 428.6136475921.

The spelling of 78740467 in words is "seventy-eight million, seven hundred forty thousand, four hundred sixty-seven".