214302440 has 32 divisors (see below), whose sum is σ = 526016160. Its totient is φ = 77928000.

The previous prime is 214302437. The next prime is 214302481. The reversal of 214302440 is 44203412.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243086 + ... + 243965.

It is an arithmetic number, because the mean of its divisors is an integer number (16438005).

Almost surely, 2^214302440 is an apocalyptic number.

214302440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

214302440 is an abundant number, since it is smaller than the sum of its proper divisors (311713720).

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

214302440 is a wasteful number, since it uses less digits than its factorization.

214302440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487073 (or 487069 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 214302440 is about 14639.0723749833. The cubic root of 214302440 is about 598.4240494424.

Adding to 214302440 its reverse (44203412), we get a palindrome (258505852).

The spelling of 214302440 in words is "two hundred fourteen million, three hundred two thousand, four hundred forty".