44040402021 has 32 divisors (see below), whose sum is σ = 73441087488. Its totient is φ = 22805922240.

The previous prime is 44040401987. The next prime is 44040402053. The reversal of 44040402021 is 12020404044.

It is not a de Polignac number, because 44040402021 - 2¹³ = 44040393829 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44040402121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 227485 + ... + 373938.

It is an arithmetic number, because the mean of its divisors is an integer number (2295033984).

Almost surely, 2^44040402021 is an apocalyptic number.

It is an amenable number.

44040402021 is a deficient number, since it is larger than the sum of its proper divisors (29400685467).

44040402021 is a wasteful number, since it uses less digits than its factorization.

44040402021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601761.

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 44040402021 its reverse (12020404044), we get a palindrome (56060806065).

The spelling of 44040402021 in words is "forty-four billion, forty million, four hundred two thousand, twenty-one".