1672721874 has 64 divisors (see below), whose sum is σ = 3893299200. Its totient is φ = 531335376.

The previous prime is 1672721861. The next prime is 1672721891. The reversal of 1672721874 is 4781272761.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 349107 + ... + 353865.

It is an arithmetic number, because the mean of its divisors is an integer number (60832800).

Almost surely, 2^1672721874 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1672721874, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1946649600).

1672721874 is an abundant number, since it is smaller than the sum of its proper divisors (2220577326).

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

1672721874 is a wasteful number, since it uses less digits than its factorization.

1672721874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5076 (or 5070 counting only the distinct ones).

The product of its digits is 263424, while the sum is 45.

The square root of 1672721874 is about 40898.9226508474. The cubic root of 1672721874 is about 1187.0652145540.

The spelling of 1672721874 in words is "one billion, six hundred seventy-two million, seven hundred twenty-one thousand, eight hundred seventy-four".