1128865242820 has 72 divisors (see below), whose sum is σ = 2757822500160. Its totient is φ = 387016217280.

The previous prime is 1128865242803. The next prime is 1128865242829. The reversal of 1128865242820 is 282425688211.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (1128865242829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27037921 + ... + 27079639.

It is an arithmetic number, because the mean of its divisors is an integer number (38303090280).

Almost surely, 2^{1128865242820} is an apocalyptic number.

1128865242820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1128865242820 is an abundant number, since it is smaller than the sum of its proper divisors (1628957257340).

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

1128865242820 is a wasteful number, since it uses less digits than its factorization.

1128865242820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69353 (or 69344 counting only the distinct ones).

The product of its (nonzero) digits is 983040, while the sum is 49.

The spelling of 1128865242820 in words is "one trillion, one hundred twenty-eight billion, eight hundred sixty-five million, two hundred forty-two thousand, eight hundred twenty".