262987989 has 8 divisors (see below), whose sum is σ = 382528032. Its totient is φ = 159386640.

The previous prime is 262987937. The next prime is 262987999. The reversal of 262987989 is 989789262.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 262987989 - 2⁸ = 262987733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (262987999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3984634 + ... + 3984699.

It is an arithmetic number, because the mean of its divisors is an integer number (47816004).

Almost surely, 2^262987989 is an apocalyptic number.

It is an amenable number.

262987989 is a deficient number, since it is larger than the sum of its proper divisors (119540043).

262987989 is a wasteful number, since it uses less digits than its factorization.

262987989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7969347.

The product of its digits is 7838208, while the sum is 60.

The square root of 262987989 is about 16216.9044210046. The cubic root of 262987989 is about 640.6861042140.

The spelling of 262987989 in words is "two hundred sixty-two million, nine hundred eighty-seven thousand, nine hundred eighty-nine".