131278490 has 32 divisors (see below), whose sum is σ = 278774784. Its totient is φ = 43557120.

The previous prime is 131278489. The next prime is 131278501. The reversal of 131278490 is 94872131.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 131278490.

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, 28079 + ... + 32418.

It is an arithmetic number, because the mean of its divisors is an integer number (8711712).

Almost surely, 2^131278490 is an apocalyptic number.

131278490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131278490 is an abundant number, since it is smaller than the sum of its proper divisors (147496294).

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

131278490 is a wasteful number, since it uses less digits than its factorization.

131278490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60542.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 131278490 is about 11457.6825754600. The cubic root of 131278490 is about 508.2349467087.

The spelling of 131278490 in words is "one hundred thirty-one million, two hundred seventy-eight thousand, four hundred ninety".