398404450 has 24 divisors (see below), whose sum is σ = 742309632. Its totient is φ = 159087120.

The previous prime is 398404429. The next prime is 398404453. The reversal of 398404450 is 54404893.

It is a super-2 number, since 2×398404450² = 317452211559605000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (398404453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23787 + ... + 36913.

It is an arithmetic number, because the mean of its divisors is an integer number (30929568).

Almost surely, 2^398404450 is an apocalyptic number.

398404450 is a deficient number, since it is larger than the sum of its proper divisors (343905182).

398404450 is a wasteful number, since it uses less digits than its factorization.

398404450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13746 (or 13741 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 398404450 is about 19960.0713926579. The cubic root of 398404450 is about 735.8253181557.

The spelling of 398404450 in words is "three hundred ninety-eight million, four hundred four thousand, four hundred fifty".