28432338551 has 8 divisors (see below), whose sum is σ = 30122578800. Its totient is φ = 26744070528.

The previous prime is 28432338547. The next prime is 28432338553. The reversal of 28432338551 is 15583323482.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28432338551 - 2² = 28432338547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28432338553) 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, 463316 + ... + 521081.

It is an arithmetic number, because the mean of its divisors is an integer number (3765322350).

Almost surely, 2^28432338551 is an apocalyptic number.

28432338551 is a deficient number, since it is larger than the sum of its proper divisors (1690240249).

28432338551 is a wasteful number, since it uses less digits than its factorization.

28432338551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986113.

The product of its digits is 691200, while the sum is 44.

The spelling of 28432338551 in words is "twenty-eight billion, four hundred thirty-two million, three hundred thirty-eight thousand, five hundred fifty-one".