1814977980 has 36 divisors (see below), whose sum is σ = 5505433752. Its totient is φ = 483994080.

The previous prime is 1814977949. The next prime is 1814977981. The reversal of 1814977980 is 897794181.

1814977980 is a `hidden beast` number, since 1 + 8 + 1 + 497 + 79 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1814977981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5041426 + ... + 5041785.

Almost surely, 2^1814977980 is an apocalyptic number.

1814977980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1814977980 is an abundant number, since it is smaller than the sum of its proper divisors (3690455772).

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

1814977980 is a wasteful number, since it uses less digits than its factorization.

1814977980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10083226 (or 10083221 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 54.

The square root of 1814977980 is about 42602.5583738817. The cubic root of 1814977980 is about 1219.8051242975.

The spelling of 1814977980 in words is "one billion, eight hundred fourteen million, nine hundred seventy-seven thousand, nine hundred eighty".