10309820 has 24 divisors (see below), whose sum is σ = 22924944. Its totient is φ = 3881216.

The previous prime is 10309813. The next prime is 10309823. The reversal of 10309820 is 2890301.

10309820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10309823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14822 + ... + 15501.

It is an arithmetic number, because the mean of its divisors is an integer number (955206).

Almost surely, 2^10309820 is an apocalyptic number.

10309820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10309820 is an abundant number, since it is smaller than the sum of its proper divisors (12615124).

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

10309820 is a wasteful number, since it uses less digits than its factorization.

10309820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30349 (or 30347 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 10309820 is about 3210.8908421184. The cubic root of 10309820 is about 217.6458351669.

The spelling of 10309820 in words is "ten million, three hundred nine thousand, eight hundred twenty".