1805979672 has 96 divisors (see below), whose sum is σ = 5835682800. Its totient is φ = 515991168.

The previous prime is 1805979667. The next prime is 1805979677. The reversal of 1805979672 is 2769795081.

It is an interprime number because it is at equal distance from previous prime (1805979667) and next prime (1805979677).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1805979677) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74733 + ... + 95900.

Almost surely, 2^1805979672 is an apocalyptic number.

1805979672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1805979672 is an abundant number, since it is smaller than the sum of its proper divisors (4029703128).

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

1805979672 is a wasteful number, since it uses less digits than its factorization.

1805979672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170662 (or 170645 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 54.

The square root of 1805979672 is about 42496.8195515853. The cubic root of 1805979672 is about 1217.7859314632.

The spelling of 1805979672 in words is "one billion, eight hundred five million, nine hundred seventy-nine thousand, six hundred seventy-two".