996988428 has 18 divisors (see below), whose sum is σ = 2520165284. Its totient is φ = 332329464.

The previous prime is 996988417. The next prime is 996988441. The reversal of 996988428 is 824889699.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×996988428² = 1987971851131822368, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13847026 + ... + 13847097.

Almost surely, 2^996988428 is an apocalyptic number.

It is an amenable number.

996988428 is an abundant number, since it is smaller than the sum of its proper divisors (1523176856).

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

996988428 is a wasteful number, since it uses less digits than its factorization.

996988428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27694133 (or 27694128 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 63.

The square root of 996988428 is about 31575.1235627036. The cubic root of 996988428 is about 998.9951332477.

The spelling of 996988428 in words is "nine hundred ninety-six million, nine hundred eighty-eight thousand, four hundred twenty-eight".