2789240 has 32 divisors (see below), whose sum is σ = 6346080. Its totient is φ = 1103232.

The previous prime is 2789239. The next prime is 2789251. The reversal of 2789240 is 429872.

2789240 = 410² + 411² + ... + 425².

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 2789197 and 2789206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3782 + ... + 4458.

It is an arithmetic number, because the mean of its divisors is an integer number (198315).

2^2789240 is an apocalyptic number.

2789240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2789240 is an abundant number, since it is smaller than the sum of its proper divisors (3556840).

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

2789240 is a wasteful number, since it uses less digits than its factorization.

2789240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791 (or 787 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 2789240 is about 1670.1017933048. The cubic root of 2789240 is about 140.7651977948.

The spelling of 2789240 in words is "two million, seven hundred eighty-nine thousand, two hundred forty".