10309540 has 12 divisors (see below), whose sum is σ = 21650076. Its totient is φ = 4123808.

The previous prime is 10309511. The next prime is 10309561. The reversal of 10309540 is 4590301.

It can be written as a sum of positive squares in 2 ways, for example, as 1201216 + 9108324 = 1096^2 + 3018^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257719 + ... + 257758.

It is an arithmetic number, because the mean of its divisors is an integer number (1804173).

Almost surely, 2^10309540 is an apocalyptic number.

10309540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10309540 is an abundant number, since it is smaller than the sum of its proper divisors (11340536).

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

10309540 is a wasteful number, since it uses less digits than its factorization.

10309540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515486 (or 515484 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 10309540 is about 3210.8472402156. The cubic root of 10309540 is about 217.6438648323.

Adding to 10309540 its reverse (4590301), we get a palindrome (14899841).

The spelling of 10309540 in words is "ten million, three hundred nine thousand, five hundred forty".