398566650 has 24 divisors (see below), whose sum is σ = 988445664. Its totient is φ = 106284400.

The previous prime is 398566643. The next prime is 398566661. The reversal of 398566650 is 56665893.

It is a super-3 number, since 3×398566650³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 398566650.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1328406 + ... + 1328705.

It is an arithmetic number, because the mean of its divisors is an integer number (41185236).

Almost surely, 2^398566650 is an apocalyptic number.

398566650 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

398566650 is an abundant number, since it is smaller than the sum of its proper divisors (589879014).

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

398566650 is a wasteful number, since it uses less digits than its factorization.

398566650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2657126 (or 2657121 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 48.

The square root of 398566650 is about 19964.1340909141. The cubic root of 398566650 is about 735.9251619814.

The spelling of 398566650 in words is "three hundred ninety-eight million, five hundred sixty-six thousand, six hundred fifty".