131820678 has 24 divisors (see below), whose sum is σ = 311576616. Its totient is φ = 39945600.

The previous prime is 131820653. The next prime is 131820713. The reversal of 131820678 is 876028131.

It is a super-4 number, since 4×131820678⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 332683 + ... + 333078.

It is an arithmetic number, because the mean of its divisors is an integer number (12982359).

Almost surely, 2^131820678 is an apocalyptic number.

131820678 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

131820678 is an abundant number, since it is smaller than the sum of its proper divisors (179755938).

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

131820678 is a wasteful number, since it uses less digits than its factorization.

131820678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665780 (or 665777 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 131820678 is about 11481.3186524894. The cubic root of 131820678 is about 508.9336658949.

The spelling of 131820678 in words is "one hundred thirty-one million, eight hundred twenty thousand, six hundred seventy-eight".