2087511840 has 72 divisors (see below), whose sum is σ = 7123639068. Its totient is φ = 556669440.

The previous prime is 2087511799. The next prime is 2087511919. The reversal of 2087511840 is 481157802.

2087511840 is a `hidden beast` number, since 20 + 87 + 511 + 8 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2010984336 + 76527504 = 44844^2 + 8748^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2087511795 and 2087511804.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 723391 + ... + 726270.

Almost surely, 2^2087511840 is an apocalyptic number.

2087511840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2087511840 is an abundant number, since it is smaller than the sum of its proper divisors (5036127228).

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

2087511840 is a wasteful number, since it uses less digits than its factorization.

2087511840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1449682 (or 1449671 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The square root of 2087511840 is about 45689.2967772541. The cubic root of 2087511840 is about 1278.0356915098.

The spelling of 2087511840 in words is "two billion, eighty-seven million, five hundred eleven thousand, eight hundred forty".