55806408 has 112 divisors (see below), whose sum is σ = 179426880. Its totient is φ = 15933024.

The previous prime is 55806407. The next prime is 55806431. The reversal of 55806408 is 80460855.

It is a happy number.

55806408 is a `hidden beast` number, since 5 + 5 + 8 + 0 + 640 + 8 = 666.

It is a super-2 number, since 2×55806408² = 6228710347724928, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (55806407) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 40141 + ... + 41507.

Almost surely, 2^55806408 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 55806408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89713440).

55806408 is an abundant number, since it is smaller than the sum of its proper divisors (123620472).

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

55806408 is a wasteful number, since it uses less digits than its factorization.

55806408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398 (or 1379 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 55806408 is about 7470.3686656015. The cubic root of 55806408 is about 382.1448606777.

The spelling of 55806408 in words is "fifty-five million, eight hundred six thousand, four hundred eight".