646212898 has 8 divisors (see below), whose sum is σ = 969593040. Its totient is φ = 323015220.

The previous prime is 646212893. The next prime is 646212907. The reversal of 646212898 is 898212646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×646212898² = 835182219083116808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (646212893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36388 + ... + 51151.

It is an arithmetic number, because the mean of its divisors is an integer number (121199130).

Almost surely, 2^646212898 is an apocalyptic number.

646212898 is a deficient number, since it is larger than the sum of its proper divisors (323380142).

646212898 is a wasteful number, since it uses less digits than its factorization.

646212898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91232.

The product of its digits is 331776, while the sum is 46.

The square root of 646212898 is about 25420.7178891549. The cubic root of 646212898 is about 864.5535013965.

The spelling of 646212898 in words is "six hundred forty-six million, two hundred twelve thousand, eight hundred ninety-eight".