216423426 has 16 divisors (see below), whose sum is σ = 433406304. Its totient is φ = 72047904.

The previous prime is 216423409. The next prime is 216423439. The reversal of 216423426 is 624324612.

It is a junction number, because it is equal to n+sod(n) for n = 216423393 and 216423402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18195 + ... + 27638.

It is an arithmetic number, because the mean of its divisors is an integer number (27087894).

Almost surely, 2^216423426 is an apocalyptic number.

216423426 is an abundant number, since it is smaller than the sum of its proper divisors (216982878).

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

216423426 is a wasteful number, since it uses less digits than its factorization.

216423426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46625.

The product of its digits is 13824, while the sum is 30.

The square root of 216423426 is about 14711.3366489928. The cubic root of 216423426 is about 600.3918052032.

The spelling of 216423426 in words is "two hundred sixteen million, four hundred twenty-three thousand, four hundred twenty-six".