55640326 has 8 divisors (see below), whose sum is σ = 95383440. Its totient is φ = 23845848.

The previous prime is 55640287. The next prime is 55640399. The reversal of 55640326 is 62304655.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1987141 + ... + 1987168.

It is an arithmetic number, because the mean of its divisors is an integer number (11922930).

Almost surely, 2^55640326 is an apocalyptic number.

55640326 is a deficient number, since it is larger than the sum of its proper divisors (39743114).

55640326 is a wasteful number, since it uses less digits than its factorization.

55640326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3974318.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 55640326 is about 7459.2443317001. The cubic root of 55640326 is about 381.7653914269.

The spelling of 55640326 in words is "fifty-five million, six hundred forty thousand, three hundred twenty-six".