2887740 has 72 divisors (see below), whose sum is σ = 8936928. Its totient is φ = 754560.

The previous prime is 2887721. The next prime is 2887741. The reversal of 2887740 is 477882.

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2887695 and 2887704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2887741) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10849 + ... + 11111.

It is an arithmetic number, because the mean of its divisors is an integer number (124124).

2^2887740 is an apocalyptic number.

2887740 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 2887740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4468464).

2887740 is an abundant number, since it is smaller than the sum of its proper divisors (6049188).

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

2887740 is a wasteful number, since it uses less digits than its factorization.

2887740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 2887740 is about 1699.3351641157. The cubic root of 2887740 is about 142.4030735144.

The spelling of 2887740 in words is "two million, eight hundred eighty-seven thousand, seven hundred forty".