2687019840 has 168 divisors, whose sum is σ = 9262981728. Its totient is φ = 714931200.

The previous prime is 2687019833. The next prime is 2687019871. The reversal of 2687019840 is 489107862.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1851115 + ... + 1852565.

It is an arithmetic number, because the mean of its divisors is an integer number (55136796).

Almost surely, 2^2687019840 is an apocalyptic number.

2687019840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2687019840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4631490864).

2687019840 is an abundant number, since it is smaller than the sum of its proper divisors (6575961888).

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

2687019840 is a wasteful number, since it uses less digits than its factorization.

2687019840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117 (or 2104 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 2687019840 is about 51836.4721021792. The cubic root of 2687019840 is about 1390.2416363038.

The spelling of 2687019840 in words is "two billion, six hundred eighty-seven million, nineteen thousand, eight hundred forty".