1115622144 has 432 divisors, whose sum is σ = 4205178432. Its totient is φ = 276037632.

The previous prime is 1115622133. The next prime is 1115622181. The reversal of 1115622144 is 4412265111.

1115622144 is a `hidden beast` number, since 11 + 15 + 622 + 14 + 4 = 666.

It is a super-2 number, since 2×1115622144² = 2489225536366313472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3564132 + ... + 3564444.

Almost surely, 2^1115622144 is an apocalyptic number.

1115622144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1115622144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2102589216).

1115622144 is an abundant number, since it is smaller than the sum of its proper divisors (3089556288).

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

1115622144 is a wasteful number, since it uses less digits than its factorization.

1115622144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372 (or 355 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1115622144 is about 33400.9302864456. The cubic root of 1115622144 is about 1037.1439588099.

Adding to 1115622144 its reverse (4412265111), we get a palindrome (5527887255).

The spelling of 1115622144 in words is "one billion, one hundred fifteen million, six hundred twenty-two thousand, one hundred forty-four".