4891998 has 8 divisors (see below), whose sum is σ = 9784008. Its totient is φ = 1630664.

The previous prime is 4891993. The next prime is 4892003. The reversal of 4891998 is 8991984.

It is an interprime number because it is at equal distance from previous prime (4891993) and next prime (4892003).

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

4891998 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4891993) 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, 407661 + ... + 407672.

It is an arithmetic number, because the mean of its divisors is an integer number (1223001).

Almost surely, 2^4891998 is an apocalyptic number.

4891998 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

4891998 is a wasteful number, since it uses less digits than its factorization.

4891998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815338.

The product of its digits is 186624, while the sum is 48.

The square root of 4891998 is about 2211.7861560287. The cubic root of 4891998 is about 169.7574164061.

The spelling of 4891998 in words is "four million, eight hundred ninety-one thousand, nine hundred ninety-eight".