28941691381644 has 48 divisors (see below), whose sum is σ = 67549526553600. Its totient is φ = 9644528952960.

The previous prime is 28941691381643. The next prime is 28941691381661. The reversal of 28941691381644 is 44618319614982.

It is not an unprimeable number, because it can be changed into a prime (28941691381643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 984430057 + ... + 984459455.

It is an arithmetic number, because the mean of its divisors is an integer number (1407281803200).

Almost surely, 2^{28941691381644} is an apocalyptic number.

It is an amenable number.

28941691381644 is an abundant number, since it is smaller than the sum of its proper divisors (38607835171956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28941691381644 is a wasteful number, since it uses less digits than its factorization.

28941691381644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49590 (or 49588 counting only the distinct ones).

The product of its digits is 71663616, while the sum is 66.

The spelling of 28941691381644 in words is "twenty-eight trillion, nine hundred forty-one billion, six hundred ninety-one million, three hundred eighty-one thousand, six hundred forty-four".