216469458 has 12 divisors (see below), whose sum is σ = 469017198. Its totient is φ = 72156480.

The previous prime is 216469457. The next prime is 216469459. The reversal of 216469458 is 854964612.

It is an interprime number because it is at equal distance from previous prime (216469457) and next prime (216469459).

It can be written as a sum of positive squares in only one way, i.e., 168818049 + 47651409 = 12993^2 + 6903^2 .

It is not an unprimeable number, because it can be changed into a prime (216469457) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6013023 + ... + 6013058.

Almost surely, 2^216469458 is an apocalyptic number.

216469458 is an abundant number, since it is smaller than the sum of its proper divisors (252547740).

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

216469458 is a wasteful number, since it uses less digits than its factorization.

216469458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12026089 (or 12026086 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 216469458 is about 14712.9010735477. The cubic root of 216469458 is about 600.4343687970.

The spelling of 216469458 in words is "two hundred sixteen million, four hundred sixty-nine thousand, four hundred fifty-eight".