78285237 has 8 divisors (see below), whose sum is σ = 104680800. Its totient is φ = 52039920.

The previous prime is 78285227. The next prime is 78285257. The reversal of 78285237 is 73258287.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78285237 - 2⁶ = 78285173 is a prime.

It is a super-2 number, since 2×78285237² = 12257156664292338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78285227) 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 7 ways as a sum of consecutive naturals, for example, 36339 + ... + 38432.

It is an arithmetic number, because the mean of its divisors is an integer number (13085100).

Almost surely, 2^78285237 is an apocalyptic number.

It is an amenable number.

78285237 is a deficient number, since it is larger than the sum of its proper divisors (26395563).

78285237 is a wasteful number, since it uses less digits than its factorization.

78285237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75123.

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

The square root of 78285237 is about 8847.8944953023. The cubic root of 78285237 is about 427.7860552561.

The spelling of 78285237 in words is "seventy-eight million, two hundred eighty-five thousand, two hundred thirty-seven".