10426640 has 80 divisors (see below), whose sum is σ = 28414848. Its totient is φ = 3483648.

The previous prime is 10426639. The next prime is 10426643. The reversal of 10426640 is 4662401.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (10426643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23864 + ... + 24296.

Almost surely, 2^10426640 is an apocalyptic number.

10426640 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 10426640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14207424).

10426640 is an abundant number, since it is smaller than the sum of its proper divisors (17988208).

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

10426640 is a wasteful number, since it uses less digits than its factorization.

10426640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496 (or 490 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 10426640 is about 3229.0308143466. The cubic root of 10426640 is about 218.4647940247.

The spelling of 10426640 in words is "ten million, four hundred twenty-six thousand, six hundred forty".