78352287 has 36 divisors (see below), whose sum is σ = 118649880. Its totient is φ = 45916416.

The previous prime is 78352277. The next prime is 78352291. The reversal of 78352287 is 78225387.

It is not a de Polignac number, because 78352287 - 2⁶ = 78352223 is a prime.

It is a super-2 number, since 2×78352287² = 12278161756260738, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78352207) 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 35 ways as a sum of consecutive naturals, for example, 1073283 + ... + 1073355.

It is an arithmetic number, because the mean of its divisors is an integer number (3295830).

Almost surely, 2^78352287 is an apocalyptic number.

78352287 is a deficient number, since it is larger than the sum of its proper divisors (40297593).

78352287 is a wasteful number, since it uses less digits than its factorization.

78352287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 118 counting only the distinct ones).

The product of its digits is 188160, while the sum is 42.

The square root of 78352287 is about 8851.6827213813. The cubic root of 78352287 is about 427.9081509459.

The spelling of 78352287 in words is "seventy-eight million, three hundred fifty-two thousand, two hundred eighty-seven".