1155422840 has 64 divisors (see below), whose sum is σ = 3054209760. Its totient is φ = 387832320.

The previous prime is 1155422803. The next prime is 1155422887. The reversal of 1155422840 is 482245511.

It is a junction number, because it is equal to n+sod(n) for n = 1155422797 and 1155422806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95279 + ... + 106718.

Almost surely, 2^1155422840 is an apocalyptic number.

1155422840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1155422840 is an abundant number, since it is smaller than the sum of its proper divisors (1898786920).

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

1155422840 is a wasteful number, since it uses less digits than its factorization.

1155422840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202032 (or 202028 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 32.

The square root of 1155422840 is about 33991.5112932626. The cubic root of 1155422840 is about 1049.3337693504. Note that the first 3 decimals are identical.

The spelling of 1155422840 in words is "one billion, one hundred fifty-five million, four hundred twenty-two thousand, eight hundred forty".