10721838 has 8 divisors (see below), whose sum is σ = 21443688. Its totient is φ = 3573944.

The previous prime is 10721831. The next prime is 10721861. The reversal of 10721838 is 83812701.

It is a happy number.

10721838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

10721838 is an admirable number.

It is a super-2 number, since 2×10721838² = 229915620196488, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10721831) 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, 893481 + ... + 893492.

It is an arithmetic number, because the mean of its divisors is an integer number (2680461).

Almost surely, 2^10721838 is an apocalyptic number.

10721838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

10721838 is a wasteful number, since it uses less digits than its factorization.

10721838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1786978.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 10721838 is about 3274.4217810172. The cubic root of 10721838 is about 220.5073552290.

It can be divided in two parts, 107 and 21838, that added together give a triangular number (21945 = T₂₀₉).

The spelling of 10721838 in words is "ten million, seven hundred twenty-one thousand, eight hundred thirty-eight".