998814240 has 120 divisors (see below), whose sum is σ = 3525027660. Its totient is φ = 266347008.

The previous prime is 998814239. The next prime is 998814241. The reversal of 998814240 is 42418899.

It is an interprime number because it is at equal distance from previous prime (998814239) and next prime (998814241).

It can be written as a sum of positive squares in 2 ways, for example, as 965220624 + 33593616 = 31068^2 + 5796^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (998814241) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 25575 + ... + 51494.

Almost surely, 2^998814240 is an apocalyptic number.

998814240 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

998814240 is an abundant number, since it is smaller than the sum of its proper divisors (2526213420).

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

998814240 is a wasteful number, since it uses less digits than its factorization.

998814240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77096 (or 77079 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 998814240 is about 31604.0225287858. The cubic root of 998814240 is about 999.6045903385.

The spelling of 998814240 in words is "nine hundred ninety-eight million, eight hundred fourteen thousand, two hundred forty".