421680290 has 16 divisors (see below), whose sum is σ = 783509760. Its totient is φ = 163230960.

The previous prime is 421680283. The next prime is 421680293. The reversal of 421680290 is 92086124.

It is not an unprimeable number, because it can be changed into a prime (421680293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 679820 + ... + 680439.

It is an arithmetic number, because the mean of its divisors is an integer number (48969360).

Almost surely, 2^421680290 is an apocalyptic number.

421680290 is a deficient number, since it is larger than the sum of its proper divisors (361829470).

421680290 is a wasteful number, since it uses less digits than its factorization.

421680290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360297.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 421680290 is about 20534.8554901173. The cubic root of 421680290 is about 749.8845985405.

The spelling of 421680290 in words is "four hundred twenty-one million, six hundred eighty thousand, two hundred ninety".