181972680 has 64 divisors (see below), whose sum is σ = 564753600. Its totient is φ = 46851840.

The previous prime is 181972627. The next prime is 181972717. The reversal of 181972680 is 86279181.

181972680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×181972680² = 66228112532764800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22666 + ... + 29625.

It is an arithmetic number, because the mean of its divisors is an integer number (8824275).

Almost surely, 2^181972680 is an apocalyptic number.

181972680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181972680 is an abundant number, since it is smaller than the sum of its proper divisors (382780920).

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

181972680 is a wasteful number, since it uses less digits than its factorization.

181972680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52334 (or 52330 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 42.

The square root of 181972680 is about 13489.7249786643. The cubic root of 181972680 is about 566.6767533768.

The spelling of 181972680 in words is "one hundred eighty-one million, nine hundred seventy-two thousand, six hundred eighty".