55590040 has 32 divisors (see below), whose sum is σ = 136449360. Its totient is φ = 20214400.

The previous prime is 55590019. The next prime is 55590043. The reversal of 55590040 is 4009555.

It is a junction number, because it is equal to n+sod(n) for n = 55589990 and 55590008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55590043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62731 + ... + 63610.

Almost surely, 2^55590040 is an apocalyptic number.

It is an amenable number.

55590040 is an abundant number, since it is smaller than the sum of its proper divisors (80859320).

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

55590040 is a wasteful number, since it uses less digits than its factorization.

55590040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126363 (or 126359 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 55590040 is about 7455.8728529931. The cubic root of 55590040 is about 381.6503475243.

Adding to 55590040 its reverse (4009555), we get a palindrome (59599595).

It can be divided in two parts, 55 and 590040, that added together give a palindrome (590095).

The spelling of 55590040 in words is "fifty-five million, five hundred ninety thousand, forty".