55396642 has 32 divisors (see below), whose sum is σ = 102909312. Its totient is φ = 21821184.

The previous prime is 55396639. The next prime is 55396651. The reversal of 55396642 is 24669355.

It is a junction number, because it is equal to n+sod(n) for n = 55396595 and 55396604.

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, 7528 + ... + 12940.

It is an arithmetic number, because the mean of its divisors is an integer number (3215916).

Almost surely, 2^55396642 is an apocalyptic number.

55396642 is a deficient number, since it is larger than the sum of its proper divisors (47512670).

55396642 is a wasteful number, since it uses less digits than its factorization.

55396642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5482.

The product of its digits is 194400, while the sum is 40.

The square root of 55396642 is about 7442.8920454350. The cubic root of 55396642 is about 381.2072455146.

The spelling of 55396642 in words is "fifty-five million, three hundred ninety-six thousand, six hundred forty-two".