28445994429 has 8 divisors (see below), whose sum is σ = 38090774592. Its totient is φ = 18882605280.

The previous prime is 28445994403. The next prime is 28445994431. The reversal of 28445994429 is 92449954482.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28445994429 - 2²¹ = 28443897277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28445999429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20346937 + ... + 20348334.

It is an arithmetic number, because the mean of its divisors is an integer number (4761346824).

Almost surely, 2^28445994429 is an apocalyptic number.

It is an amenable number.

28445994429 is a deficient number, since it is larger than the sum of its proper divisors (9644780163).

28445994429 is a wasteful number, since it uses less digits than its factorization.

28445994429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40695507.

The product of its digits is 29859840, while the sum is 60.

The spelling of 28445994429 in words is "twenty-eight billion, four hundred forty-five million, nine hundred ninety-four thousand, four hundred twenty-nine".