216387460 has 24 divisors (see below), whose sum is σ = 456031296. Its totient is φ = 86246880.

The previous prime is 216387443. The next prime is 216387461. The reversal of 216387460 is 64783612.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (216387461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13456 + ... + 24775.

It is an arithmetic number, because the mean of its divisors is an integer number (19001304).

Almost surely, 2^216387460 is an apocalyptic number.

216387460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216387460 is an abundant number, since it is smaller than the sum of its proper divisors (239643836).

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

216387460 is a wasteful number, since it uses less digits than its factorization.

216387460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38523 (or 38521 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 216387460 is about 14710.1142075784. The cubic root of 216387460 is about 600.3585449591.

The spelling of 216387460 in words is "two hundred sixteen million, three hundred eighty-seven thousand, four hundred sixty".