1819727480 has 16 divisors (see below), whose sum is σ = 4094386920. Its totient is φ = 727890976.

The previous prime is 1819727473. The next prime is 1819727509. The reversal of 1819727480 is 847279181.

It is a happy number.

It is a super-2 number, since 2×1819727480² = 6622816202934300800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22746554 + ... + 22746633.

Almost surely, 2^1819727480 is an apocalyptic number.

1819727480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1819727480 is an abundant number, since it is smaller than the sum of its proper divisors (2274659440).

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

1819727480 is a wasteful number, since it uses less digits than its factorization.

1819727480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45493198 (or 45493194 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 47.

The square root of 1819727480 is about 42658.2639121660. The cubic root of 1819727480 is about 1220.8682075819.

The spelling of 1819727480 in words is "one billion, eight hundred nineteen million, seven hundred twenty-seven thousand, four hundred eighty".