216073858 has 64 divisors (see below), whose sum is σ = 447084288. Its totient is φ = 75582720.

The previous prime is 216073853. The next prime is 216073877. The reversal of 216073858 is 858370612.

It is a super-2 number, since 2×216073858² = 93375824222008328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 216073858.

It is not an unprimeable number, because it can be changed into a prime (216073853) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72616 + ... + 75532.

It is an arithmetic number, because the mean of its divisors is an integer number (6985692).

Almost surely, 2^216073858 is an apocalyptic number.

216073858 is an abundant number, since it is smaller than the sum of its proper divisors (231010430).

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

216073858 is a wasteful number, since it uses less digits than its factorization.

216073858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2987.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 216073858 is about 14699.4509421271. The cubic root of 216073858 is about 600.0683792439.

The spelling of 216073858 in words is "two hundred sixteen million, seventy-three thousand, eight hundred fifty-eight".