501478198 has 16 divisors (see below), whose sum is σ = 819843696. Its totient is φ = 228661920.

The previous prime is 501478193. The next prime is 501478199. The reversal of 501478198 is 891874105.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501478193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114033 + ... + 118348.

It is an arithmetic number, because the mean of its divisors is an integer number (51240231).

Almost surely, 2^501478198 is an apocalyptic number.

501478198 is a deficient number, since it is larger than the sum of its proper divisors (318365498).

501478198 is a wasteful number, since it uses less digits than its factorization.

501478198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232479.

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 501478198 is about 22393.7088933477. The cubic root of 501478198 is about 794.4819208051.

The spelling of 501478198 in words is "five hundred one million, four hundred seventy-eight thousand, one hundred ninety-eight".