131438770 has 32 divisors (see below), whose sum is σ = 249641280. Its totient is φ = 49688640.

The previous prime is 131438753. The next prime is 131438773. The reversal of 131438770 is 77834131.

It is a super-2 number, since 2×131438770² = 34552300518225800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131438773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153664 + ... + 154516.

It is an arithmetic number, because the mean of its divisors is an integer number (7801290).

Almost surely, 2^131438770 is an apocalyptic number.

131438770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131438770 is a deficient number, since it is larger than the sum of its proper divisors (118202510).

131438770 is a wasteful number, since it uses less digits than its factorization.

131438770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 131438770 is about 11464.6748754598. The cubic root of 131438770 is about 508.4416999700.

The spelling of 131438770 in words is "one hundred thirty-one million, four hundred thirty-eight thousand, seven hundred seventy".