10389920 has 24 divisors (see below), whose sum is σ = 24546564. Its totient is φ = 4155904.

The previous prime is 10389913. The next prime is 10389923. The reversal of 10389920 is 2998301.

It can be written as a sum of positive squares in 2 ways, for example, as 10163344 + 226576 = 3188^2 + 476^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (10389923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32309 + ... + 32628.

Almost surely, 2^10389920 is an apocalyptic number.

10389920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10389920 is an abundant number, since it is smaller than the sum of its proper divisors (14156644).

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

10389920 is an equidigital number, since it uses as much as digits as its factorization.

10389920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64952 (or 64944 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 10389920 is about 3223.3398827924. The cubic root of 10389920 is about 218.2080330454.

The spelling of 10389920 in words is "ten million, three hundred eighty-nine thousand, nine hundred twenty".