55457389 has 8 divisors (see below), whose sum is σ = 59790752. Its totient is φ = 51133680.

The previous prime is 55457387. The next prime is 55457429. The reversal of 55457389 is 98375455.

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

It is not a de Polignac number, because 55457389 - 2¹ = 55457387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55457387) 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, 13402 + ... + 17044.

It is an arithmetic number, because the mean of its divisors is an integer number (7473844).

Almost surely, 2^55457389 is an apocalyptic number.

It is an amenable number.

55457389 is a deficient number, since it is larger than the sum of its proper divisors (4333363).

55457389 is a wasteful number, since it uses less digits than its factorization.

55457389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4827.

The product of its digits is 756000, while the sum is 46.

The square root of 55457389 is about 7446.9718006717. The cubic root of 55457389 is about 381.3465363709.

The spelling of 55457389 in words is "fifty-five million, four hundred fifty-seven thousand, three hundred eighty-nine".