420846388 has 6 divisors (see below), whose sum is σ = 736481186. Its totient is φ = 210423192.

The previous prime is 420846367. The next prime is 420846389. The reversal of 420846388 is 883648024.

It can be written as a sum of positive squares in only one way, i.e., 420578064 + 268324 = 20508^2 + 518^2 .

It is a super-2 number, since 2×420846388² = 354223364585293088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420846389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52605795 + ... + 52605802.

Almost surely, 2^420846388 is an apocalyptic number.

It is an amenable number.

420846388 is a deficient number, since it is larger than the sum of its proper divisors (315634798).

420846388 is a wasteful number, since it uses less digits than its factorization.

420846388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105211601 (or 105211599 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 43.

The square root of 420846388 is about 20514.5408917675. The cubic root of 420846388 is about 749.3899560779.

The spelling of 420846388 in words is "four hundred twenty million, eight hundred forty-six thousand, three hundred eighty-eight".