216465396 has 48 divisors (see below), whose sum is σ = 597152640. Its totient is φ = 59713920.

The previous prime is 216465391. The next prime is 216465419. The reversal of 216465396 is 693564612.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216465391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41995 + ... + 46866.

It is an arithmetic number, because the mean of its divisors is an integer number (12440680).

Almost surely, 2^216465396 is an apocalyptic number.

It is an amenable number.

216465396 is an abundant number, since it is smaller than the sum of its proper divisors (380687244).

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

216465396 is a wasteful number, since it uses less digits than its factorization.

216465396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88904 (or 88902 counting only the distinct ones).

The product of its digits is 233280, while the sum is 42.

The square root of 216465396 is about 14712.7630307839. The cubic root of 216465396 is about 600.4306131022.

The spelling of 216465396 in words is "two hundred sixteen million, four hundred sixty-five thousand, three hundred ninety-six".