55391394 has 8 divisors (see below), whose sum is σ = 110782800. Its totient is φ = 18463796.

The previous prime is 55391377. The next prime is 55391407. The reversal of 55391394 is 49319355.

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

55391394 is an admirable 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, 4615944 + ... + 4615955.

It is an arithmetic number, because the mean of its divisors is an integer number (13847850).

Almost surely, 2^55391394 is an apocalyptic number.

55391394 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55391394 is a wasteful number, since it uses less digits than its factorization.

55391394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9231904.

The product of its digits is 72900, while the sum is 39.

The square root of 55391394 is about 7442.5394859550. The cubic root of 55391394 is about 381.1952072470.

The spelling of 55391394 in words is "fifty-five million, three hundred ninety-one thousand, three hundred ninety-four".