1987494888 has 32 divisors (see below), whose sum is σ = 5261016960. Its totient is φ = 623527680.

The previous prime is 1987494869. The next prime is 1987494911. The reversal of 1987494888 is 8884947891.

It is a super-2 number, since 2×1987494888² = 7900271859652265088, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2435248 + ... + 2436063.

It is an arithmetic number, because the mean of its divisors is an integer number (164406780).

Almost surely, 2^1987494888 is an apocalyptic number.

It is an amenable number.

1987494888 is an abundant number, since it is smaller than the sum of its proper divisors (3273522072).

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

1987494888 is a wasteful number, since it uses less digits than its factorization.

1987494888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4871337 (or 4871333 counting only the distinct ones).

The product of its digits is 37158912, while the sum is 66.

The square root of 1987494888 is about 44581.3289169356. The cubic root of 1987494888 is about 1257.2896489501.

The spelling of 1987494888 in words is "one billion, nine hundred eighty-seven million, four hundred ninety-four thousand, eight hundred eighty-eight".