55647740 has 24 divisors (see below), whose sum is σ = 117567072. Its totient is φ = 22124480.

The previous prime is 55647737. The next prime is 55647769. The reversal of 55647740 is 4774655.

It is a junction number, because it is equal to n+sod(n) for n = 55647694 and 55647703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4991 + ... + 11670.

It is an arithmetic number, because the mean of its divisors is an integer number (4898628).

Almost surely, 2^55647740 is an apocalyptic number.

It is an amenable number.

55647740 is an abundant number, since it is smaller than the sum of its proper divisors (61919332).

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

55647740 is a wasteful number, since it uses less digits than its factorization.

55647740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16837 (or 16835 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 38.

The square root of 55647740 is about 7459.7412823770. The cubic root of 55647740 is about 381.7823472519.

The spelling of 55647740 in words is "fifty-five million, six hundred forty-seven thousand, seven hundred forty".