845772678 has 56 divisors (see below), whose sum is σ = 2014066728. Its totient is φ = 265332672.

The previous prime is 845772649. The next prime is 845772701. The reversal of 845772678 is 876277548.

It is a happy number.

845772678 is a `hidden beast` number, since 8 + 4 + 577 + 2 + 67 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 7725 + ... + 41847.

Almost surely, 2^845772678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 845772678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1007033364).

845772678 is an abundant number, since it is smaller than the sum of its proper divisors (1168294050).

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

845772678 is a wasteful number, since it uses less digits than its factorization.

845772678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34160 (or 34145 counting only the distinct ones).

The product of its digits is 5268480, while the sum is 54.

The square root of 845772678 is about 29082.1711362821. The cubic root of 845772678 is about 945.6952706517.

The spelling of 845772678 in words is "eight hundred forty-five million, seven hundred seventy-two thousand, six hundred seventy-eight".