10406840 has 16 divisors (see below), whose sum is σ = 23415480. Its totient is φ = 4162720.

The previous prime is 10406827. The next prime is 10406843. The reversal of 10406840 is 4860401.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10406843) 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, 130046 + ... + 130125.

Almost surely, 2^10406840 is an apocalyptic number.

10406840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10406840 is an abundant number, since it is smaller than the sum of its proper divisors (13008640).

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

10406840 is a wasteful number, since it uses less digits than its factorization.

10406840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260182 (or 260178 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 10406840 is about 3225.9634219873. The cubic root of 10406840 is about 218.3264195054.

The spelling of 10406840 in words is "ten million, four hundred six thousand, eight hundred forty".