10721444 has 12 divisors (see below), whose sum is σ = 18889500. Its totient is φ = 5324448.

The previous prime is 10721419. The next prime is 10721461. The reversal of 10721444 is 44412701.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4571044 + 6150400 = 2138^2 + 2480^2 .

It is a super-2 number, since 2×10721444² = 229898722890272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8399 + ... + 9590.

It is an arithmetic number, because the mean of its divisors is an integer number (1574125).

Almost surely, 2^10721444 is an apocalyptic number.

It is an amenable number.

10721444 is a deficient number, since it is larger than the sum of its proper divisors (8168056).

10721444 is a wasteful number, since it uses less digits than its factorization.

10721444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18142 (or 18140 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 10721444 is about 3274.3616171706. The cubic root of 10721444 is about 220.5046541696.

The spelling of 10721444 in words is "ten million, seven hundred twenty-one thousand, four hundred forty-four".