103205640 has 64 divisors (see below), whose sum is σ = 327836160. Its totient is φ = 25902080.

The previous prime is 103205639. The next prime is 103205659. The reversal of 103205640 is 46502301.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23256 + ... + 27335.

It is an arithmetic number, because the mean of its divisors is an integer number (5122440).

Almost surely, 2^103205640 is an apocalyptic number.

103205640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

103205640 is an abundant number, since it is smaller than the sum of its proper divisors (224630520).

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

103205640 is a wasteful number, since it uses less digits than its factorization.

103205640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50622 (or 50618 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 103205640 is about 10159.0176690466. The cubic root of 103205640 is about 469.0665644751.

Adding to 103205640 its reverse (46502301), we get a palindrome (149707941).

The spelling of 103205640 in words is "one hundred three million, two hundred five thousand, six hundred forty".