55816740 has 144 divisors (see below), whose sum is σ = 199879680. Its totient is φ = 12337920.

The previous prime is 55816727. The next prime is 55816751. The reversal of 55816740 is 4761855.

55816740 is a `hidden beast` number, since 5 + 581 + 6 + 74 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 55816695 and 55816704.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38346 + ... + 39774.

It is a vampire number, since it can be written as 6510 ⋅ 8574 (with its own digits).

Almost surely, 2^55816740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55816740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99939840).

55816740 is an abundant number, since it is smaller than the sum of its proper divisors (144062940).

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

55816740 is a wasteful number, since it uses less digits than its factorization.

55816740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482 (or 1477 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 55816740 is about 7471.0601657328. The cubic root of 55816740 is about 382.1684426593.

It can be divided in two parts, 5581 and 6740, that added together give a palindrome (12321).

The spelling of 55816740 in words is "fifty-five million, eight hundred sixteen thousand, seven hundred forty".