1187993488 has 30 divisors (see below), whose sum is σ = 2530012982. Its totient is φ = 539996160.

The previous prime is 1187993467. The next prime is 1187993509. The reversal of 1187993488 is 8843997811.

It is an interprime number because it is at equal distance from previous prime (1187993467) and next prime (1187993509).

It can be written as a sum of positive squares in only one way, i.e., 678498304 + 509495184 = 26048^2 + 22572^2 .

It is a super-2 number, since 2×1187993488² = 2822657055060812288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 304881 + ... + 308752.

Almost surely, 2^1187993488 is an apocalyptic number.

It is an amenable number.

1187993488 is an abundant number, since it is smaller than the sum of its proper divisors (1342019494).

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

1187993488 is a wasteful number, since it uses less digits than its factorization.

1187993488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613663 (or 613646 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 58.

The square root of 1187993488 is about 34467.2814129574. The cubic root of 1187993488 is about 1059.1025654404.

The spelling of 1187993488 in words is "one billion, one hundred eighty-seven million, nine hundred ninety-three thousand, four hundred eighty-eight".