55444390 has 32 divisors (see below), whose sum is σ = 101606400. Its totient is φ = 21780864.

The previous prime is 55444387. The next prime is 55444427. The reversal of 55444390 is 9344455.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189084 + ... + 189376.

It is an arithmetic number, because the mean of its divisors is an integer number (3175200).

Almost surely, 2^55444390 is an apocalyptic number.

55444390 is a deficient number, since it is larger than the sum of its proper divisors (46162010).

55444390 is a wasteful number, since it uses less digits than its factorization.

55444390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 55444390 is about 7446.0989786599. The cubic root of 55444390 is about 381.3167386525.

It can be divided in two parts, 554 and 44390, that added together give a palindrome (44944).

The spelling of 55444390 in words is "fifty-five million, four hundred forty-four thousand, three hundred ninety".