420781898 has 8 divisors (see below), whose sum is σ = 631261092. Its totient is φ = 210361536.

The previous prime is 420781877. The next prime is 420781919. The reversal of 420781898 is 898187024.

It is an interprime number because it is at equal distance from previous prime (420781877) and next prime (420781919).

It can be written as a sum of positive squares in 2 ways, for example, as 286523329 + 134258569 = 16927^2 + 11587^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15986 + ... + 33122.

Almost surely, 2^420781898 is an apocalyptic number.

420781898 is a deficient number, since it is larger than the sum of its proper divisors (210479194).

420781898 is a wasteful number, since it uses less digits than its factorization.

420781898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29416.

The product of its (nonzero) digits is 258048, while the sum is 47.

The square root of 420781898 is about 20512.9690196227. The cubic root of 420781898 is about 749.3516755806.

The spelling of 420781898 in words is "four hundred twenty million, seven hundred eighty-one thousand, eight hundred ninety-eight".