1155387888 has 200 divisors, whose sum is σ = 3539023488. Its totient is φ = 363166848.

The previous prime is 1155387859. The next prime is 1155387907. The reversal of 1155387888 is 8887835511.

1155387888 is a `hidden beast` number, since 1 + 1 + 553 + 8 + 7 + 8 + 88 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2473831 + ... + 2474297.

Almost surely, 2^1155387888 is an apocalyptic number.

1155387888 is a gapful number since it is divisible by the number (18) 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 1155387888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1769511744).

1155387888 is an abundant number, since it is smaller than the sum of its proper divisors (2383635600).

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

1155387888 is a wasteful number, since it uses less digits than its factorization.

1155387888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593 (or 578 counting only the distinct ones).

The product of its digits is 2150400, while the sum is 54.

The square root of 1155387888 is about 33990.9971610131. The cubic root of 1155387888 is about 1049.3231883225.

The spelling of 1155387888 in words is "one billion, one hundred fifty-five million, three hundred eighty-seven thousand, eight hundred eighty-eight".