28312253970 has 576 divisors, whose sum is σ = 97574077440. Its totient is φ = 5129879040.

The previous prime is 28312253969. The next prime is 28312254007. The reversal of 28312253970 is 7935221382.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 81591337 + ... + 81591683.

It is an arithmetic number, because the mean of its divisors is an integer number (169399440).

Almost surely, 2^28312253970 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28312253970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48787038720).

28312253970 is an abundant number, since it is smaller than the sum of its proper divisors (69261823470).

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

28312253970 is a wasteful number, since it uses less digits than its factorization.

28312253970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

It can be divided in two parts, 28312 and 253970, that added together give a palindrome (282282).

The spelling of 28312253970 in words is "twenty-eight billion, three hundred twelve million, two hundred fifty-three thousand, nine hundred seventy".