1721672372 has 24 divisors (see below), whose sum is σ = 3475531584. Its totient is φ = 730962432.

The previous prime is 1721672371. The next prime is 1721672387. The reversal of 1721672372 is 2732761271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1721672371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284333 + ... + 290324.

It is an arithmetic number, because the mean of its divisors is an integer number (144813816).

Almost surely, 2^1721672372 is an apocalyptic number.

It is an amenable number.

1721672372 is an abundant number, since it is smaller than the sum of its proper divisors (1753859212).

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

1721672372 is a wasteful number, since it uses less digits than its factorization.

1721672372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574775 (or 574773 counting only the distinct ones).

The product of its digits is 49392, while the sum is 38.

The square root of 1721672372 is about 41493.0400428795. The cubic root of 1721672372 is about 1198.5334797918.

The spelling of 1721672372 in words is "one billion, seven hundred twenty-one million, six hundred seventy-two thousand, three hundred seventy-two".