55403288 has 32 divisors (see below), whose sum is σ = 106479360. Its totient is φ = 27017760.

The previous prime is 55403287. The next prime is 55403321. The reversal of 55403288 is 88230455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55403287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58031 + ... + 58977.

It is an arithmetic number, because the mean of its divisors is an integer number (3327480).

Almost surely, 2^55403288 is an apocalyptic number.

It is an amenable number.

55403288 is a deficient number, since it is larger than the sum of its proper divisors (51076072).

55403288 is a wasteful number, since it uses less digits than its factorization.

55403288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127 (or 1123 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 35.

The square root of 55403288 is about 7443.3384982815. The cubic root of 55403288 is about 381.2224895315. Note that the first 3 decimals are identical.

The spelling of 55403288 in words is "fifty-five million, four hundred three thousand, two hundred eighty-eight".