55728172 has 24 divisors (see below), whose sum is σ = 104138496. Its totient is φ = 26030928.

The previous prime is 55728163. The next prime is 55728181. The reversal of 55728172 is 27182755.

It is an interprime number because it is at equal distance from previous prime (55728163) and next prime (55728181).

It is a super-3 number, since 3×55728172³ (a number of 24 digits) contains 333 as substring.

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 7 ways as a sum of consecutive naturals, for example, 3088 + ... + 10999.

It is an arithmetic number, because the mean of its divisors is an integer number (4339104).

Almost surely, 2^55728172 is an apocalyptic number.

It is an amenable number.

55728172 is a deficient number, since it is larger than the sum of its proper divisors (48410324).

55728172 is a wasteful number, since it uses less digits than its factorization.

55728172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14157 (or 14155 counting only the distinct ones).

The product of its digits is 39200, while the sum is 37.

The square root of 55728172 is about 7465.1304074343. The cubic root of 55728172 is about 381.9661985935.

It can be divided in two parts, 55728 and 172, that multiplied together give a square (9585216 = 3096²).

The spelling of 55728172 in words is "fifty-five million, seven hundred twenty-eight thousand, one hundred seventy-two".