55724438 has 32 divisors (see below), whose sum is σ = 105995520. Its totient is φ = 21339360.

The previous prime is 55724437. The next prime is 55724443. The reversal of 55724438 is 83442755.

It is a happy number.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55724437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6020 + ... + 12152.

It is an arithmetic number, because the mean of its divisors is an integer number (3312360).

Almost surely, 2^55724438 is an apocalyptic number.

55724438 is a deficient number, since it is larger than the sum of its proper divisors (50271082).

55724438 is a wasteful number, since it uses less digits than its factorization.

55724438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6212.

The product of its digits is 134400, while the sum is 38.

The square root of 55724438 is about 7464.8803071449. The cubic root of 55724438 is about 381.9576673391.

The spelling of 55724438 in words is "fifty-five million, seven hundred twenty-four thousand, four hundred thirty-eight".