398886827490 has 48 divisors (see below), whose sum is σ = 1037514816000. Its totient is φ = 106327865376.

The previous prime is 398886827483. The next prime is 398886827491. The reversal of 398886827490 is 94728688893.

398886827490 is a `hidden beast` number, since 39 + 8 + 8 + 86 + 8 + 27 + 490 = 666.

It is a super-2 number, since 2×398886827490² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (398886827491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 644290 + ... + 1101309.

It is an arithmetic number, because the mean of its divisors is an integer number (21614892000).

Almost surely, 2^398886827490 is an apocalyptic number.

398886827490 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

398886827490 is an abundant number, since it is smaller than the sum of its proper divisors (638627988510).

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

398886827490 is a wasteful number, since it uses less digits than its factorization.

398886827490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1748151 (or 1748148 counting only the distinct ones).

The product of its (nonzero) digits is 334430208, while the sum is 72.

The spelling of 398886827490 in words is "three hundred ninety-eight billion, eight hundred eighty-six million, eight hundred twenty-seven thousand, four hundred ninety".