10402440 has 64 divisors (see below), whose sum is σ = 32572800. Its totient is φ = 2652672.

The previous prime is 10402429. The next prime is 10402451. The reversal of 10402440 is 4420401.

10402440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (10402429) and next prime (10402451).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 876 + ... + 4644.

It is an arithmetic number, because the mean of its divisors is an integer number (508950).

Almost surely, 2^10402440 is an apocalyptic number.

10402440 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 10402440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16286400).

10402440 is an abundant number, since it is smaller than the sum of its proper divisors (22170360).

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

10402440 is a wasteful number, since it uses less digits than its factorization.

10402440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3806 (or 3802 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 10402440 is about 3225.2813830734. The cubic root of 10402440 is about 218.2956457815.

Adding to 10402440 its reverse (4420401), we get a palindrome (14822841).

The spelling of 10402440 in words is "ten million, four hundred two thousand, four hundred forty".