10423440 has 120 divisors (see below), whose sum is σ = 36211968. Its totient is φ = 2684160.

The previous prime is 10423433. The next prime is 10423453. The reversal of 10423440 is 4432401.

It is a tau number, because it is divible by the number of its divisors (120).

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 23 ways as a sum of consecutive naturals, for example, 22087 + ... + 22553.

Almost surely, 2^10423440 is an apocalyptic number.

10423440 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 10423440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18105984).

10423440 is an abundant number, since it is smaller than the sum of its proper divisors (25788528).

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

10423440 is a wasteful number, since it uses less digits than its factorization.

10423440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517 (or 508 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 10423440 is about 3228.5352716054. The cubic root of 10423440 is about 218.4424423412.

Adding to 10423440 its reverse (4432401), we get a palindrome (14855841).

The spelling of 10423440 in words is "ten million, four hundred twenty-three thousand, four hundred forty".