398508796 has 48 divisors (see below), whose sum is σ = 826302400. Its totient is φ = 164602368.

The previous prime is 398508779. The next prime is 398508797. The reversal of 398508796 is 697805893.

It is a happy number.

398508796 is a nontrivial binomial coefficient, being equal to C(28232, 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398508797) 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, 111160 + ... + 114688.

Almost surely, 2^398508796 is an apocalyptic number.

398508796 is the 28231-st triangular number and also the 14116-th hexagonal number.

398508796 is the 9411-st centered nonagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398508796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (413151200).

398508796 is an abundant number, since it is smaller than the sum of its proper divisors (427793604).

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

398508796 is a wasteful number, since it uses less digits than its factorization.

398508796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3686 (or 3684 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 55.

The square root of 398508796 is about 19962.6850899372. The cubic root of 398508796 is about 735.8895524838.

The spelling of 398508796 in words is "three hundred ninety-eight million, five hundred eight thousand, seven hundred ninety-six".