55682540 has 72 divisors (see below), whose sum is σ = 129136560. Its totient is φ = 20110464.

The previous prime is 55682537. The next prime is 55682567. The reversal of 55682540 is 4528655.

It is a self number, because there is not a number n which added to its sum of digits gives 55682540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 200882 + ... + 201158.

Almost surely, 2^55682540 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 55682540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64568280).

55682540 is an abundant number, since it is smaller than the sum of its proper divisors (73454020).

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

55682540 is a wasteful number, since it uses less digits than its factorization.

55682540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351 (or 326 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 35.

The square root of 55682540 is about 7462.0734383950. The cubic root of 55682540 is about 381.8619147667.

The spelling of 55682540 in words is "fifty-five million, six hundred eighty-two thousand, five hundred forty".