1721900484 has 24 divisors (see below), whose sum is σ = 4464186720. Its totient is φ = 573966792.

The previous prime is 1721900461. The next prime is 1721900501. The reversal of 1721900484 is 4840091271.

1721900484 is a `hidden beast` number, since 172 + 1 + 9 + 0 + 0 + 484 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7971654 + ... + 7971869.

It is an arithmetic number, because the mean of its divisors is an integer number (186007780).

Almost surely, 2^1721900484 is an apocalyptic number.

It is an amenable number.

1721900484 is an abundant number, since it is smaller than the sum of its proper divisors (2742286236).

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

1721900484 is a wasteful number, since it uses less digits than its factorization.

1721900484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15943536 (or 15943528 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 1721900484 is about 41495.7887501852. The cubic root of 1721900484 is about 1198.5864104577.

The spelling of 1721900484 in words is "one billion, seven hundred twenty-one million, nine hundred thousand, four hundred eighty-four".