10209240 has 160 divisors (see below), whose sum is σ = 36067680. Its totient is φ = 2585088.

The previous prime is 10209233. The next prime is 10209281. The reversal of 10209240 is 4290201.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 74452 + ... + 74588.

It is an arithmetic number, because the mean of its divisors is an integer number (225423).

Almost surely, 2^10209240 is an apocalyptic number.

10209240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10209240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18033840).

10209240 is an abundant number, since it is smaller than the sum of its proper divisors (25858440).

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

10209240 is a wasteful number, since it uses less digits than its factorization.

10209240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 10209240 is about 3195.1901351876. The cubic root of 10209240 is about 216.9357550831.

Adding to 10209240 its reverse (4290201), we get a palindrome (14499441).

The spelling of 10209240 in words is "ten million, two hundred nine thousand, two hundred forty".