2687397408 has 36 divisors (see below), whose sum is σ = 7642287198. Its totient is φ = 895799040.

The previous prime is 2687397389. The next prime is 2687397457. The reversal of 2687397408 is 8047937862.

It can be written as a sum of positive squares in only one way, i.e., 2177902224 + 509495184 = 46668^2 + 22572^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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, 4665333 + ... + 4665908.

Almost surely, 2^2687397408 is an apocalyptic number.

It is an amenable number.

2687397408 is an abundant number, since it is smaller than the sum of its proper divisors (4954889790).

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

2687397408 is a wasteful number, since it uses less digits than its factorization.

2687397408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9331257 (or 9331246 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The square root of 2687397408 is about 51840.1138887638. The cubic root of 2687397408 is about 1390.3067500979.

The spelling of 2687397408 in words is "two billion, six hundred eighty-seven million, three hundred ninety-seven thousand, four hundred eight".