289987396 has 6 divisors (see below), whose sum is σ = 507477950. Its totient is φ = 144993696.

The previous prime is 289987393. The next prime is 289987409. The reversal of 289987396 is 693789982.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 152769600 + 137217796 = 12360^2 + 11714^2 .

It is not an unprimeable number, because it can be changed into a prime (289987391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36248421 + ... + 36248428.

Almost surely, 2^289987396 is an apocalyptic number.

It is an amenable number.

289987396 is a deficient number, since it is larger than the sum of its proper divisors (217490554).

289987396 is a wasteful number, since it uses less digits than its factorization.

289987396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72496853 (or 72496851 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 61.

The square root of 289987396 is about 17029.0162957230. The cubic root of 289987396 is about 661.9010053291.

The spelling of 289987396 in words is "two hundred eighty-nine million, nine hundred eighty-seven thousand, three hundred ninety-six".