1672320546 has 128 divisors (see below), whose sum is σ = 4148928000. Its totient is φ = 496005120.

The previous prime is 1672320541. The next prime is 1672320571. The reversal of 1672320546 is 6450232761.

1672320546 is a `hidden beast` number, since 16 + 72 + 32 + 0 + 546 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1672320546.

It is not an unprimeable number, because it can be changed into a prime (1672320541) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2791555 + ... + 2792153.

It is an arithmetic number, because the mean of its divisors is an integer number (32413500).

Almost surely, 2^1672320546 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1672320546, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2074464000).

1672320546 is an abundant number, since it is smaller than the sum of its proper divisors (2476607454).

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

1672320546 is a wasteful number, since it uses less digits than its factorization.

1672320546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761 (or 755 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 1672320546 is about 40894.0160170165. The cubic root of 1672320546 is about 1186.9702713717.

The spelling of 1672320546 in words is "one billion, six hundred seventy-two million, three hundred twenty thousand, five hundred forty-six".