55507938 has 8 divisors (see below), whose sum is σ = 111015888. Its totient is φ = 18502644.

The previous prime is 55507937. The next prime is 55507951. The reversal of 55507938 is 83970555.

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

55507938 is an admirable number.

It is a super-2 number, since 2×55507938² = 6162262362023688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55507938.

It is not an unprimeable number, because it can be changed into a prime (55507931) 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 3 ways as a sum of consecutive naturals, for example, 4625656 + ... + 4625667.

It is an arithmetic number, because the mean of its divisors is an integer number (13876986).

Almost surely, 2^55507938 is an apocalyptic number.

55507938 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.

55507938 is a wasteful number, since it uses less digits than its factorization.

55507938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9251328.

The product of its (nonzero) digits is 189000, while the sum is 42.

The square root of 55507938 is about 7450.3649575038. The cubic root of 55507938 is about 381.4623660348.

The spelling of 55507938 in words is "fifty-five million, five hundred seven thousand, nine hundred thirty-eight".