2490728 has 8 divisors (see below), whose sum is σ = 4670130. Its totient is φ = 1245360.

The previous prime is 2490727. The next prime is 2490731. The reversal of 2490728 is 8270942.

It can be written as a sum of positive squares in only one way, i.e., 1747684 + 743044 = 1322^2 + 862^2 .

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

It is a d-powerful number, because it can be written as 2¹⁷ + 4⁹ + 9 + 0 + 7³ + 2²¹ + 8 .

It is a junction number, because it is equal to n+sod(n) for n = 2490694 and 2490703.

It is not an unprimeable number, because it can be changed into a prime (2490727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155663 + ... + 155678.

2^2490728 is an apocalyptic number.

It is an amenable number.

2490728 is a deficient number, since it is larger than the sum of its proper divisors (2179402).

2490728 is a wasteful number, since it uses less digits than its factorization.

2490728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311347 (or 311343 counting only the distinct ones).

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

The square root of 2490728 is about 1578.2040425750. The cubic root of 2490728 is about 135.5528857706.

The spelling of 2490728 in words is "two million, four hundred ninety thousand, seven hundred twenty-eight".