1855494980 has 24 divisors (see below), whose sum is σ = 3900693888. Its totient is φ = 741406688.

The previous prime is 1855494973. The next prime is 1855495009. The reversal of 1855494980 is 894945581.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30044 + ... + 67923.

It is an arithmetic number, because the mean of its divisors is an integer number (162528912).

Almost surely, 2^1855494980 is an apocalyptic number.

1855494980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1855494980 is an abundant number, since it is smaller than the sum of its proper divisors (2045198908).

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

1855494980 is a wasteful number, since it uses less digits than its factorization.

1855494980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98923 (or 98921 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 53.

The square root of 1855494980 is about 43075.4568170786. The cubic root of 1855494980 is about 1228.8152559788.

The spelling of 1855494980 in words is "one billion, eight hundred fifty-five million, four hundred ninety-four thousand, nine hundred eighty".