990422894 has 8 divisors (see below), whose sum is σ = 1485797808. Its totient is φ = 495156960.

The previous prime is 990422893. The next prime is 990422897. The reversal of 990422894 is 498224099.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990422891) 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, 1574 + ... + 44534.

It is an arithmetic number, because the mean of its divisors is an integer number (185724726).

Almost surely, 2^990422894 is an apocalyptic number.

990422894 is a deficient number, since it is larger than the sum of its proper divisors (495374914).

990422894 is a wasteful number, since it uses less digits than its factorization.

990422894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54490.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 990422894 is about 31470.9849543989. The cubic root of 990422894 is about 996.7973855434.

The spelling of 990422894 in words is "nine hundred ninety million, four hundred twenty-two thousand, eight hundred ninety-four".