2487661988 has 18 divisors (see below), whose sum is σ = 5064169446. Its totient is φ = 1066140768.

The previous prime is 2487661951. The next prime is 2487661993. The reversal of 2487661988 is 8891667842.

It can be written as a sum of positive squares in only one way, i.e., 1566418084 + 921243904 = 39578^2 + 30352^2 .

It is a super-2 number, since 2×2487661988² = 12376924333080224288, 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, 6345881 + ... + 6346272.

It is an arithmetic number, because the mean of its divisors is an integer number (281342747).

Almost surely, 2^2487661988 is an apocalyptic number.

2487661988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2487661988 is an abundant number, since it is smaller than the sum of its proper divisors (2576507458).

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

2487661988 is a wasteful number, since it uses less digits than its factorization.

2487661988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12692171 (or 12692162 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 59.

The square root of 2487661988 is about 49876.4672766626. The cubic root of 2487661988 is about 1354.9724241062.

The spelling of 2487661988 in words is "two billion, four hundred eighty-seven million, six hundred sixty-one thousand, nine hundred eighty-eight".