78133875 has 32 divisors (see below), whose sum is σ = 135682560. Its totient is φ = 39855200.

The previous prime is 78133873. The next prime is 78133889. The reversal of 78133875 is 57833187.

It is not a de Polignac number, because 78133875 - 2¹ = 78133873 is a prime.

It is a super-2 number, since 2×78133875² = 12209804845031250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78133873) 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, 4096 + ... + 13154.

It is an arithmetic number, because the mean of its divisors is an integer number (4240080).

Almost surely, 2^78133875 is an apocalyptic number.

78133875 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

78133875 is a deficient number, since it is larger than the sum of its proper divisors (57548685).

78133875 is a wasteful number, since it uses less digits than its factorization.

78133875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9100 (or 9090 counting only the distinct ones).

The product of its digits is 141120, while the sum is 42.

The square root of 78133875 is about 8839.3367963892. The cubic root of 78133875 is about 427.5101738285.

The spelling of 78133875 in words is "seventy-eight million, one hundred thirty-three thousand, eight hundred seventy-five".