28552257431 has 8 divisors (see below), whose sum is σ = 29799143520. Its totient is φ = 27305828352.

The previous prime is 28552257337. The next prime is 28552257439. The reversal of 28552257431 is 13475225582.

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 28552257431 - 2¹⁸ = 28551995287 is a prime.

It is a super-2 number, since 2×28552257431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28552257439) 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, 16631 + ... + 239543.

It is an arithmetic number, because the mean of its divisors is an integer number (3724892940).

Almost surely, 2^28552257431 is an apocalyptic number.

28552257431 is a deficient number, since it is larger than the sum of its proper divisors (1246886089).

28552257431 is a wasteful number, since it uses less digits than its factorization.

28552257431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228505.

The product of its digits is 672000, while the sum is 44.

The spelling of 28552257431 in words is "twenty-eight billion, five hundred fifty-two million, two hundred fifty-seven thousand, four hundred thirty-one".