420489438 has 16 divisors (see below), whose sum is σ = 841240080. Its totient is φ = 140119616.

The previous prime is 420489431. The next prime is 420489463. The reversal of 420489438 is 834984024.

It is a super-2 number, since 2×420489438² = 353622734939111688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 420489438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420489431) 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, 14656 + ... + 32492.

It is an arithmetic number, because the mean of its divisors is an integer number (52577505).

Almost surely, 2^420489438 is an apocalyptic number.

420489438 is an abundant number, since it is smaller than the sum of its proper divisors (420750642).

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

420489438 is a wasteful number, since it uses less digits than its factorization.

420489438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21771.

The product of its (nonzero) digits is 221184, while the sum is 42.

The square root of 420489438 is about 20505.8391196264. The cubic root of 420489438 is about 749.1780256956.

The spelling of 420489438 in words is "four hundred twenty million, four hundred eighty-nine thousand, four hundred thirty-eight".