2318728 has 8 divisors (see below), whose sum is σ = 4347630. Its totient is φ = 1159360.

The previous prime is 2318711. The next prime is 2318731. The reversal of 2318728 is 8278132.

It can be written as a sum of positive squares in only one way, i.e., 1582564 + 736164 = 1258^2 + 858^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 2318728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144913 + ... + 144928.

2^2318728 is an apocalyptic number.

It is an amenable number.

2318728 is a deficient number, since it is larger than the sum of its proper divisors (2028902).

2318728 is a wasteful number, since it uses less digits than its factorization.

2318728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289847 (or 289843 counting only the distinct ones).

The product of its digits is 5376, while the sum is 31.

The square root of 2318728 is about 1522.7370094668. The cubic root of 2318728 is about 132.3579205641.

The spelling of 2318728 in words is "two million, three hundred eighteen thousand, seven hundred twenty-eight".