1298831436 has 180 divisors, whose sum is σ = 4122640368. Its totient is φ = 354860352.

The previous prime is 1298831419. The next prime is 1298831447. The reversal of 1298831436 is 6341388921.

It is a junction number, because it is equal to n+sod(n) for n = 1298831391 and 1298831400.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 363370 + ... + 366926.

Almost surely, 2^1298831436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1298831436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2061320184).

1298831436 is an abundant number, since it is smaller than the sum of its proper divisors (2823808932).

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

1298831436 is a wasteful number, since it uses less digits than its factorization.

1298831436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610 (or 3592 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 1298831436 is about 36039.3040443347. The cubic root of 1298831436 is about 1091.0657690193.

The spelling of 1298831436 in words is "one billion, two hundred ninety-eight million, eight hundred thirty-one thousand, four hundred thirty-six".