421781490 has 48 divisors (see below), whose sum is σ = 1180991448. Its totient is φ = 103822848.

The previous prime is 421781417. The next prime is 421781491. The reversal of 421781490 is 94187124.

It can be written as a sum of positive squares in 4 ways, for example, as 222039801 + 199741689 = 14901^2 + 14133^2 .

It is not an unprimeable number, because it can be changed into a prime (421781491) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 179079 + ... + 181418.

Almost surely, 2^421781490 is an apocalyptic number.

421781490 is an abundant number, since it is smaller than the sum of its proper divisors (759209958).

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

421781490 is a wasteful number, since it uses less digits than its factorization.

421781490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360523 (or 360520 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 421781490 is about 20537.3194453414. The cubic root of 421781490 is about 749.9445825720.

The spelling of 421781490 in words is "four hundred twenty-one million, seven hundred eighty-one thousand, four hundred ninety".