78252811 has 16 divisors (see below), whose sum is σ = 101382400. Its totient is φ = 58654368.

The previous prime is 78252803. The next prime is 78252847. The reversal of 78252811 is 11825287.

It is not a de Polignac number, because 78252811 - 2³ = 78252803 is a prime.

It is a super-2 number, since 2×78252811² = 12247004858803442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78252871) 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 15 ways as a sum of consecutive naturals, for example, 20901 + ... + 24358.

It is an arithmetic number, because the mean of its divisors is an integer number (6336400).

Almost surely, 2^78252811 is an apocalyptic number.

78252811 is a deficient number, since it is larger than the sum of its proper divisors (23129589).

78252811 is a wasteful number, since it uses less digits than its factorization.

78252811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45298.

The product of its digits is 8960, while the sum is 34.

The square root of 78252811 is about 8846.0618921642. The cubic root of 78252811 is about 427.7269836406.

The spelling of 78252811 in words is "seventy-eight million, two hundred fifty-two thousand, eight hundred eleven".