1653705944 has 64 divisors (see below), whose sum is σ = 3438167040. Its totient is φ = 739416960.

The previous prime is 1653705929. The next prime is 1653705953. The reversal of 1653705944 is 4495073561.

It is a super-2 number, since 2×1653705944² = 5469486698441862272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 1653705895 and 1653705904.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2724089 + ... + 2724695.

It is an arithmetic number, because the mean of its divisors is an integer number (53721360).

Almost surely, 2^1653705944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1653705944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1719083520).

1653705944 is an abundant number, since it is smaller than the sum of its proper divisors (1784461096).

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

1653705944 is a wasteful number, since it uses less digits than its factorization.

1653705944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080 (or 1076 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 44.

The square root of 1653705944 is about 40665.7834548899. The cubic root of 1653705944 is about 1182.5497732135.

The spelling of 1653705944 in words is "one billion, six hundred fifty-three million, seven hundred five thousand, nine hundred forty-four".