998406057 has 32 divisors (see below), whose sum is σ = 1564286976. Its totient is φ = 560102400.

The previous prime is 998406049. The next prime is 998406137. The reversal of 998406057 is 750604899.

It is not a de Polignac number, because 998406057 - 2³ = 998406049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 998405997 and 998406015.

It is not an unprimeable number, because it can be changed into a prime (998406037) 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 31 ways as a sum of consecutive naturals, for example, 2313 + ... + 44745.

It is an arithmetic number, because the mean of its divisors is an integer number (48883968).

Almost surely, 2^998406057 is an apocalyptic number.

It is an amenable number.

998406057 is a deficient number, since it is larger than the sum of its proper divisors (565880919).

998406057 is a wasteful number, since it uses less digits than its factorization.

998406057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42501.

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 998406057 is about 31597.5640991517. The cubic root of 998406057 is about 999.4684031215.

The spelling of 998406057 in words is "nine hundred ninety-eight million, four hundred six thousand, fifty-seven".