55445438 has 4 divisors (see below), whose sum is σ = 83168160. Its totient is φ = 27722718.

The previous prime is 55445413. The next prime is 55445443. The reversal of 55445438 is 83454455.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13861358 + ... + 13861361.

It is an arithmetic number, because the mean of its divisors is an integer number (20792040).

Almost surely, 2^55445438 is an apocalyptic number.

55445438 is a deficient number, since it is larger than the sum of its proper divisors (27722722).

55445438 is a wasteful number, since it uses less digits than its factorization.

55445438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27722721.

The product of its digits is 192000, while the sum is 38.

The square root of 55445438 is about 7446.1693507467. The cubic root of 55445438 is about 381.3191411644.

The spelling of 55445438 in words is "fifty-five million, four hundred forty-five thousand, four hundred thirty-eight".