994156640 has 24 divisors (see below), whose sum is σ = 2348695440. Its totient is φ = 397662592.

The previous prime is 994156633. The next prime is 994156649. The reversal of 994156640 is 46651499.

It is a junction number, because it is equal to n+sod(n) for n = 994156591 and 994156600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (994156649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3106580 + ... + 3106899.

It is an arithmetic number, because the mean of its divisors is an integer number (97862310).

Almost surely, 2^994156640 is an apocalyptic number.

It is an amenable number.

994156640 is an abundant number, since it is smaller than the sum of its proper divisors (1354538800).

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

994156640 is a wasteful number, since it uses less digits than its factorization.

994156640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6213494 (or 6213486 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 994156640 is about 31530.2496025642. The cubic root of 994156640 is about 998.0484070962.

The spelling of 994156640 in words is "nine hundred ninety-four million, one hundred fifty-six thousand, six hundred forty".