653444 has 12 divisors (see below), whose sum is σ = 1247568. Its totient is φ = 297000.

The previous prime is 653431. The next prime is 653461. The reversal of 653444 is 444356.

It is a super-2 number, since 2×653444² = 853978122272, which contains 22 as substring.

It is an unprimeable number.

653444 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7382 + ... + 7469.

It is an arithmetic number, because the mean of its divisors is an integer number (103964).

2⁶⁵³⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

653444 is a deficient number, since it is larger than the sum of its proper divisors (594124).

653444 is a wasteful number, since it uses less digits than its factorization.

653444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14866 (or 14864 counting only the distinct ones).

The product of its digits is 5760, while the sum is 26.

The square root of 653444 is about 808.3588312130. The cubic root of 653444 is about 86.7766322735.

It can be divided in two parts, 6534 and 44, that multiplied together give a cube (287496 = 66³).

The spelling of 653444 in words is "six hundred fifty-three thousand, four hundred forty-four".