78492285 has 12 divisors (see below), whose sum is σ = 136053372. Its totient is φ = 41862528.

The previous prime is 78492277. The next prime is 78492289. The reversal of 78492285 is 58229487.

It can be written as a sum of positive squares in 2 ways, for example, as 29127609 + 49364676 = 5397^2 + 7026^2 .

It is not a de Polignac number, because 78492285 - 2³ = 78492277 is a prime.

It is a super-2 number, since 2×78492285² = 12322077609042450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1744273 = 78492285 / (7 + 8 + 4 + 9 + 2 + 2 + 8 + 5).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 78492285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78492289) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 872092 + ... + 872181.

It is an arithmetic number, because the mean of its divisors is an integer number (11337781).

Almost surely, 2^78492285 is an apocalyptic number.

It is an amenable number.

78492285 is a deficient number, since it is larger than the sum of its proper divisors (57561087).

78492285 is a wasteful number, since it uses less digits than its factorization.

78492285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744284 (or 1744281 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 78492285 is about 8859.5871799989. The cubic root of 78492285 is about 428.1628580016.

The spelling of 78492285 in words is "seventy-eight million, four hundred ninety-two thousand, two hundred eighty-five".