996637500 has 144 divisors (see below), whose sum is σ = 3230730720. Its totient is φ = 265680000.

The previous prime is 996637489. The next prime is 996637501. The reversal of 996637500 is 5736699.

996637500 is a `hidden beast` number, since 9 + 9 + 6 + 637 + 5 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (996637501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 336024 + ... + 338976.

It is an arithmetic number, because the mean of its divisors is an integer number (22435630).

Almost surely, 2^996637500 is an apocalyptic number.

996637500 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

996637500 is the 16875-th nonagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 996637500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1615365360).

996637500 is an abundant number, since it is smaller than the sum of its proper divisors (2234093220).

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

996637500 is a wasteful number, since it uses less digits than its factorization.

996637500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2991 (or 2963 counting only the distinct ones).

The product of its (nonzero) digits is 306180, while the sum is 45.

The square root of 996637500 is about 31569.5660407298. The cubic root of 996637500 is about 998.8779080473.

The spelling of 996637500 in words is "nine hundred ninety-six million, six hundred thirty-seven thousand, five hundred".