28151117240 has 32 divisors (see below), whose sum is σ = 63759497760. Its totient is φ = 11185872000.

The previous prime is 28151117219. The next prime is 28151117251. The reversal of 28151117240 is 4271115182.

It is a junction number, because it is equal to n+sod(n) for n = 28151117197 and 28151117206.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2324351 + ... + 2336430.

It is an arithmetic number, because the mean of its divisors is an integer number (1992484305).

Almost surely, 2^28151117240 is an apocalyptic number.

28151117240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28151117240 is an abundant number, since it is smaller than the sum of its proper divisors (35608380520).

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

28151117240 is a wasteful number, since it uses less digits than its factorization.

28151117240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4660943 (or 4660939 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 32.

The spelling of 28151117240 in words is "twenty-eight billion, one hundred fifty-one million, one hundred seventeen thousand, two hundred forty".