55393438 has 8 divisors (see below), whose sum is σ = 83525760. Its totient is φ = 27551520.

The previous prime is 55393433. The next prime is 55393439. The reversal of 55393438 is 83439355.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 55393438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55393433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72123 + ... + 72886.

It is an arithmetic number, because the mean of its divisors is an integer number (10440720).

Almost surely, 2^55393438 is an apocalyptic number.

55393438 is a deficient number, since it is larger than the sum of its proper divisors (28132322).

55393438 is a wasteful number, since it uses less digits than its factorization.

55393438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145202.

The product of its digits is 194400, while the sum is 40.

The square root of 55393438 is about 7442.6768034088. The cubic root of 55393438 is about 381.1998960224.

The spelling of 55393438 in words is "fifty-five million, three hundred ninety-three thousand, four hundred thirty-eight".