990894994 has 8 divisors (see below), whose sum is σ = 1486482480. Its totient is φ = 495400836.

The previous prime is 990894991. The next prime is 990895019. The reversal of 990894994 is 499498099.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (990894991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17517 + ... + 47839.

It is an arithmetic number, because the mean of its divisors is an integer number (185810310).

Almost surely, 2^990894994 is an apocalyptic number.

990894994 is a deficient number, since it is larger than the sum of its proper divisors (495587486).

990894994 is a wasteful number, since it uses less digits than its factorization.

990894994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46664.

The product of its (nonzero) digits is 7558272, while the sum is 61.

The square root of 990894994 is about 31478.4846204515. The cubic root of 990894994 is about 996.9557398846.

The spelling of 990894994 in words is "nine hundred ninety million, eight hundred ninety-four thousand, nine hundred ninety-four".