56767878 has 40 divisors (see below), whose sum is σ = 128168040. Its totient is φ = 18779040.

The previous prime is 56767873. The next prime is 56767883. The reversal of 56767878 is 87876765.

56767878 is a `hidden beast` number, since 567 + 6 + 7 + 8 + 78 = 666.

56767878 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is an interprime number because it is at equal distance from previous prime (56767873) and next prime (56767883).

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

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56767873) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 21258 + ... + 23778.

It is an arithmetic number, because the mean of its divisors is an integer number (3204201).

Almost surely, 2^56767878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56767878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64084020).

56767878 is an abundant number, since it is smaller than the sum of its proper divisors (71400162).

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

56767878 is a wasteful number, since it uses less digits than its factorization.

56767878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2674 (or 2665 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 54.

The square root of 56767878 is about 7534.4460977566. The cubic root of 56767878 is about 384.3269919815.

The spelling of 56767878 in words is "fifty-six million, seven hundred sixty-seven thousand, eight hundred seventy-eight".