2378640285 has 96 divisors (see below), whose sum is σ = 4797112320. Its totient is φ = 1067935104.

The previous prime is 2378640263. The next prime is 2378640293. The reversal of 2378640285 is 5820468732.

2378640285 is a `hidden beast` number, since 237 + 8 + 6 + 402 + 8 + 5 = 666.

It is not a de Polignac number, because 2378640285 - 2⁸ = 2378640029 is a prime.

It is a super-3 number, since 3×2378640285³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

Together with 2418472035 it forms an amicable pair .

It is a self number, because there is not a number n which added to its sum of digits gives 2378640285.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5418096 + ... + 5418534.

It is an arithmetic number, because the mean of its divisors is an integer number (49969920).

Almost surely, 2^2378640285 is an apocalyptic number.

It is an amenable number.

2378640285 is an abundant number, since it is smaller than the sum of its proper divisors (2418472035).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2378640285 is a wasteful number, since it uses less digits than its factorization.

2378640285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727 (or 724 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The square root of 2378640285 is about 48771.3059595496. The cubic root of 2378640285 is about 1334.8821425223.

The spelling of 2378640285 in words is "two billion, three hundred seventy-eight million, six hundred forty thousand, two hundred eighty-five".