216426290 has 16 divisors (see below), whose sum is σ = 399069720. Its totient is φ = 84458880.

The previous prime is 216426289. The next prime is 216426293. The reversal of 216426290 is 92624612.

It can be written as a sum of positive squares in 4 ways, for example, as 79512889 + 136913401 = 8917^2 + 11701^2 .

It is not an unprimeable number, because it can be changed into a prime (216426293) 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, 263525 + ... + 264344.

Almost surely, 2^216426290 is an apocalyptic number.

216426290 is a deficient number, since it is larger than the sum of its proper divisors (182643430).

216426290 is a wasteful number, since it uses less digits than its factorization.

216426290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527917.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 216426290 is about 14711.4339885682. The cubic root of 216426290 is about 600.3944535834.

The spelling of 216426290 in words is "two hundred sixteen million, four hundred twenty-six thousand, two hundred ninety".