55839402 has 32 divisors (see below), whose sum is σ = 125199360. Its totient is φ = 18446400.

The previous prime is 55839353. The next prime is 55839451. The reversal of 55839402 is 20493855.

It is an interprime number because it is at equal distance from previous prime (55839353) and next prime (55839451).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1527 + ... + 10677.

It is an arithmetic number, because the mean of its divisors is an integer number (3912480).

Almost surely, 2^55839402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55839402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62599680).

55839402 is an abundant number, since it is smaller than the sum of its proper divisors (69359958).

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

55839402 is a wasteful number, since it uses less digits than its factorization.

55839402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9275 (or 9269 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 55839402 is about 7472.5766640430. The cubic root of 55839402 is about 382.2201567114.

The spelling of 55839402 in words is "fifty-five million, eight hundred thirty-nine thousand, four hundred two".