44157993 has 16 divisors (see below), whose sum is σ = 68008896. Its totient is φ = 25187840.

The previous prime is 44157979. The next prime is 44158001. The reversal of 44157993 is 39975144.

It is a cyclic number.

It is not a de Polignac number, because 44157993 - 2⁶ = 44157929 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (44157293) by changing a digit.

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, 38796 + ... + 39917.

It is an arithmetic number, because the mean of its divisors is an integer number (4250556).

Almost surely, 2^44157993 is an apocalyptic number.

It is an amenable number.

44157993 is a deficient number, since it is larger than the sum of its proper divisors (23850903).

44157993 is a wasteful number, since it uses less digits than its factorization.

44157993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78744.

The product of its digits is 136080, while the sum is 42.

The square root of 44157993 is about 6645.1480796142. The cubic root of 44157993 is about 353.4568820542.

It can be divided in two parts, 44157 and 993, that added together give a triangular number (45150 = T₃₀₀).

The spelling of 44157993 in words is "forty-four million, one hundred fifty-seven thousand, nine hundred ninety-three".