214089778 has 16 divisors (see below), whose sum is σ = 367525440. Its totient is φ = 91624176.

The previous prime is 214089769. The next prime is 214089781. The reversal of 214089778 is 877980412.

214089778 is a nontrivial binomial coefficient, being equal to C(20693, 2).

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, 1 + ... + 20692.

It is an arithmetic number, because the mean of its divisors is an integer number (22970340).

Almost surely, 2^214089778 is an apocalyptic number.

214089778 is the 20692-nd triangular number.

214089778 is the 6898-th centered nonagonal number.

214089778 is a deficient number, since it is larger than the sum of its proper divisors (153435662).

214089778 is a wasteful number, since it uses less digits than its factorization.

214089778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21441.

The product of its (nonzero) digits is 225792, while the sum is 46.

The square root of 214089778 is about 14631.8070654311. The cubic root of 214089778 is about 598.2260361823.

The spelling of 214089778 in words is "two hundred fourteen million, eighty-nine thousand, seven hundred seventy-eight".