996778406 has 16 divisors (see below), whose sum is σ = 1616005104. Its totient is φ = 458387424.

The previous prime is 996778351. The next prime is 996778417. The reversal of 996778406 is 604877699.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62000 + ... + 76403.

It is an arithmetic number, because the mean of its divisors is an integer number (101000319).

Almost surely, 2^996778406 is an apocalyptic number.

996778406 is a deficient number, since it is larger than the sum of its proper divisors (619226698).

996778406 is a wasteful number, since it uses less digits than its factorization.

996778406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138695.

The product of its (nonzero) digits is 4572288, while the sum is 56.

The square root of 996778406 is about 31571.7976364983. The cubic root of 996778406 is about 998.9249800796.

The spelling of 996778406 in words is "nine hundred ninety-six million, seven hundred seventy-eight thousand, four hundred six".