1115645380 has 24 divisors (see below), whose sum is σ = 2358377280. Its totient is φ = 443301600.

The previous prime is 1115645371. The next prime is 1115645381. The reversal of 1115645380 is 835465111.

It is a super-2 number, since 2×1115645380² = 2489329227830688800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1115645381) 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, 181690 + ... + 187729.

It is an arithmetic number, because the mean of its divisors is an integer number (98265720).

Almost surely, 2^1115645380 is an apocalyptic number.

1115645380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1115645380 is an abundant number, since it is smaller than the sum of its proper divisors (1242731900).

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

1115645380 is a wasteful number, since it uses less digits than its factorization.

1115645380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369579 (or 369577 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 1115645380 is about 33401.2781192577. The cubic root of 1115645380 is about 1037.1511592495.

The spelling of 1115645380 in words is "one billion, one hundred fifteen million, six hundred forty-five thousand, three hundred eighty".