55394290 has 16 divisors (see below), whose sum is σ = 113954112. Its totient is φ = 18992304.

The previous prime is 55394257. The next prime is 55394293. The reversal of 55394290 is 9249355.

It is not an unprimeable number, because it can be changed into a prime (55394293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 395604 + ... + 395743.

It is an arithmetic number, because the mean of its divisors is an integer number (7122132).

Almost surely, 2^55394290 is an apocalyptic number.

55394290 is an abundant number, since it is smaller than the sum of its proper divisors (58559822).

55394290 is a wasteful number, since it uses less digits than its factorization.

55394290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791361.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 55394290 is about 7442.7340406601. The cubic root of 55394290 is about 381.2018504094.

The spelling of 55394290 in words is "fifty-five million, three hundred ninety-four thousand, two hundred ninety".