216377628 has 48 divisors (see below), whose sum is σ = 520525824. Its totient is φ = 69906240.

The previous prime is 216377627. The next prime is 216377633. The reversal of 216377628 is 826773612.

216377628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 216377628.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216377627) 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, 137301 + ... + 138867.

It is an arithmetic number, because the mean of its divisors is an integer number (10844288).

Almost surely, 2^216377628 is an apocalyptic number.

It is an amenable number.

216377628 is an abundant number, since it is smaller than the sum of its proper divisors (304148196).

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

216377628 is a wasteful number, since it uses less digits than its factorization.

216377628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1922 (or 1920 counting only the distinct ones).

The product of its digits is 169344, while the sum is 42.

The square root of 216377628 is about 14709.7800119512. The cubic root of 216377628 is about 600.3494519882.

The spelling of 216377628 in words is "two hundred sixteen million, three hundred seventy-seven thousand, six hundred twenty-eight".