420981994 has 8 divisors (see below), whose sum is σ = 639466560. Its totient is φ = 207826476.

The previous prime is 420981991. The next prime is 420982057. The reversal of 420981994 is 499189024.

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

It is not an unprimeable number, because it can be changed into a prime (420981991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1332064 + ... + 1332379.

It is an arithmetic number, because the mean of its divisors is an integer number (79933320).

Almost surely, 2^420981994 is an apocalyptic number.

420981994 is a deficient number, since it is larger than the sum of its proper divisors (218484566).

420981994 is a wasteful number, since it uses less digits than its factorization.

420981994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2664524.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 420981994 is about 20517.8457446195. The cubic root of 420981994 is about 749.4704374319.

The spelling of 420981994 in words is "four hundred twenty million, nine hundred eighty-one thousand, nine hundred ninety-four".