131028280 has 16 divisors (see below), whose sum is σ = 294813720. Its totient is φ = 52411296.

The previous prime is 131028277. The next prime is 131028281. The reversal of 131028280 is 82820131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131028281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1637814 + ... + 1637893.

Almost surely, 2^131028280 is an apocalyptic number.

131028280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131028280 is an abundant number, since it is smaller than the sum of its proper divisors (163785440).

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

131028280 is a wasteful number, since it uses less digits than its factorization.

131028280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3275718 (or 3275714 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 131028280 is about 11446.7584931281. The cubic root of 131028280 is about 507.9118515290.

The spelling of 131028280 in words is "one hundred thirty-one million, twenty-eight thousand, two hundred eighty".