78268011 has 32 divisors (see below), whose sum is σ = 115568640. Its totient is φ = 46895904.

The previous prime is 78268007. The next prime is 78268027. The reversal of 78268011 is 11086287.

It is a happy number.

It is not a de Polignac number, because 78268011 - 2² = 78268007 is a prime.

It is a super-2 number, since 2×78268011² = 12251763091792242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78268081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 297466 + ... + 297728.

It is an arithmetic number, because the mean of its divisors is an integer number (3611520).

Almost surely, 2^78268011 is an apocalyptic number.

78268011 is a deficient number, since it is larger than the sum of its proper divisors (37300629).

78268011 is a wasteful number, since it uses less digits than its factorization.

78268011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 78268011 is about 8846.9209898133. The cubic root of 78268011 is about 427.7546760611.

The spelling of 78268011 in words is "seventy-eight million, two hundred sixty-eight thousand, eleven".