2390728 has 8 divisors (see below), whose sum is σ = 4482630. Its totient is φ = 1195360.

The previous prime is 2390723. The next prime is 2390737. The reversal of 2390728 is 8270932.

It can be written as a sum of positive squares in only one way, i.e., 2079364 + 311364 = 1442^2 + 558^2 .

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 2390728.

It is not an unprimeable number, because it can be changed into a prime (2390723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 149413 + ... + 149428.

2^2390728 is an apocalyptic number.

It is an amenable number.

2390728 is a deficient number, since it is larger than the sum of its proper divisors (2091902).

2390728 is a wasteful number, since it uses less digits than its factorization.

2390728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298847 (or 298843 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 2390728 is about 1546.1979174737. The cubic root of 2390728 is about 133.7139513296.

It can be divided in two parts, 2 and 390728, that multiplied together give a square (781456 = 884²).

The spelling of 2390728 in words is "two million, three hundred ninety thousand, seven hundred twenty-eight".