216475028 has 48 divisors (see below), whose sum is σ = 474690048. Its totient is φ = 83916000.

The previous prime is 216475027. The next prime is 216475033. The reversal of 216475028 is 820574612.

216475028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×216475028² = 93722875495201568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216475027) 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, 63323 + ... + 66653.

It is an arithmetic number, because the mean of its divisors is an integer number (9889376).

Almost surely, 2^216475028 is an apocalyptic number.

216475028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216475028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237345024).

216475028 is an abundant number, since it is smaller than the sum of its proper divisors (258215020).

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

216475028 is a wasteful number, since it uses less digits than its factorization.

216475028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3564 (or 3562 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 216475028 is about 14713.0903619872. The cubic root of 216475028 is about 600.4395187010.

The spelling of 216475028 in words is "two hundred sixteen million, four hundred seventy-five thousand, twenty-eight".