299142540 has 144 divisors (see below), whose sum is σ = 994200480. Its totient is φ = 72468480.

The previous prime is 299142509. The next prime is 299142559. The reversal of 299142540 is 45241992.

299142540 is a `hidden beast` number, since 29 + 91 + 4 + 2 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 299142495 and 299142504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 87055 + ... + 90425.

It is an arithmetic number, because the mean of its divisors is an integer number (6904170).

Almost surely, 2^299142540 is an apocalyptic number.

299142540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 299142540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (497100240).

299142540 is an abundant number, since it is smaller than the sum of its proper divisors (695057940).

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

299142540 is a wasteful number, since it uses less digits than its factorization.

299142540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3432 (or 3427 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 299142540 is about 17295.7376252070. The cubic root of 299142540 is about 668.7945503847.

The spelling of 299142540 in words is "two hundred ninety-nine million, one hundred forty-two thousand, five hundred forty".