1721450464 has 144 divisors (see below), whose sum is σ = 3866652720. Its totient is φ = 752025600.

The previous prime is 1721450453. The next prime is 1721450473. The reversal of 1721450464 is 4640541271.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17044014 + ... + 17044114.

It is an arithmetic number, because the mean of its divisors is an integer number (26851755).

Almost surely, 2^1721450464 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 1721450464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1933326360).

1721450464 is an abundant number, since it is smaller than the sum of its proper divisors (2145202256).

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

1721450464 is a wasteful number, since it uses less digits than its factorization.

1721450464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 1721450464 is about 41490.3659178851. The cubic root of 1721450464 is about 1198.4819842035.

The spelling of 1721450464 in words is "one billion, seven hundred twenty-one million, four hundred fifty thousand, four hundred sixty-four".