78304867 has 4 divisors (see below), whose sum is σ = 79970976. Its totient is φ = 76638760.

The previous prime is 78304861. The next prime is 78304883. The reversal of 78304867 is 76840387.

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

It is a cyclic number.

It is not a de Polignac number, because 78304867 - 2⁷ = 78304739 is a prime.

It is a super-2 number, since 2×78304867² = 12263304391775378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78304861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 832984 + ... + 833077.

It is an arithmetic number, because the mean of its divisors is an integer number (19992744).

Almost surely, 2^78304867 is an apocalyptic number.

78304867 is a deficient number, since it is larger than the sum of its proper divisors (1666109).

78304867 is a wasteful number, since it uses less digits than its factorization.

78304867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666108.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 78304867 is about 8849.0037292342. The cubic root of 78304867 is about 427.8218080102.

The spelling of 78304867 in words is "seventy-eight million, three hundred four thousand, eight hundred sixty-seven".