1672908720 has 160 divisors (see below), whose sum is σ = 5938762752. Its totient is φ = 381613056.

The previous prime is 1672908719. The next prime is 1672908737. The reversal of 1672908720 is 278092761.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1650934 + ... + 1651946.

Almost surely, 2^1672908720 is an apocalyptic number.

1672908720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1672908720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2969381376).

1672908720 is an abundant number, since it is smaller than the sum of its proper divisors (4265854032).

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

1672908720 is a wasteful number, since it uses less digits than its factorization.

1672908720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2019 (or 2013 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 1672908720 is about 40901.2068281610. The cubic root of 1672908720 is about 1187.1094120050.

The spelling of 1672908720 in words is "one billion, six hundred seventy-two million, nine hundred eight thousand, seven hundred twenty".