131449840 has 20 divisors (see below), whose sum is σ = 305621064. Its totient is φ = 52579904.

The previous prime is 131449819. The next prime is 131449861. The reversal of 131449840 is 48944131.

It is an interprime number because it is at equal distance from previous prime (131449819) and next prime (131449861).

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 131449796 and 131449805.

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, 821482 + ... + 821641.

Almost surely, 2^131449840 is an apocalyptic number.

131449840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131449840 is an abundant number, since it is smaller than the sum of its proper divisors (174171224).

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

131449840 is a wasteful number, since it uses less digits than its factorization.

131449840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643136 (or 1643130 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 131449840 is about 11465.1576526448. The cubic root of 131449840 is about 508.4559735150.

The spelling of 131449840 in words is "one hundred thirty-one million, four hundred forty-nine thousand, eight hundred forty".