216453740 has 12 divisors (see below), whose sum is σ = 454552896. Its totient is φ = 86581488.

The previous prime is 216453739. The next prime is 216453761. The reversal of 216453740 is 47354612.

It is a junction number, because it is equal to n+sod(n) for n = 216453697 and 216453706.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5411324 + ... + 5411363.

It is an arithmetic number, because the mean of its divisors is an integer number (37879408).

Almost surely, 2^216453740 is an apocalyptic number.

216453740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216453740 is an abundant number, since it is smaller than the sum of its proper divisors (238099156).

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

216453740 is a wasteful number, since it uses less digits than its factorization.

216453740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10822696 (or 10822694 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 216453740 is about 14712.3669067897. The cubic root of 216453740 is about 600.4198357910.

The spelling of 216453740 in words is "two hundred sixteen million, four hundred fifty-three thousand, seven hundred forty".