398244940 has 24 divisors (see below), whose sum is σ = 880331760. Its totient is φ = 150913728.

The previous prime is 398244937. The next prime is 398244943. The reversal of 398244940 is 49442893.

It is an interprime number because it is at equal distance from previous prime (398244937) and next prime (398244943).

It is not an unprimeable number, because it can be changed into a prime (398244943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 523627 + ... + 524386.

It is an arithmetic number, because the mean of its divisors is an integer number (36680490).

Almost surely, 2^398244940 is an apocalyptic number.

It is an amenable number.

398244940 is an abundant number, since it is smaller than the sum of its proper divisors (482086820).

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

398244940 is a wasteful number, since it uses less digits than its factorization.

398244940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048041 (or 1048039 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 398244940 is about 19956.0752654424. The cubic root of 398244940 is about 735.7271037540.

The spelling of 398244940 in words is "three hundred ninety-eight million, two hundred forty-four thousand, nine hundred forty".