420402132 has 36 divisors (see below), whose sum is σ = 1118615680. Its totient is φ = 132758352.

The previous prime is 420402121. The next prime is 420402139. The reversal of 420402132 is 231204024.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420402139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 306628 + ... + 307995.

Almost surely, 2^420402132 is an apocalyptic number.

It is an amenable number.

420402132 is an abundant number, since it is smaller than the sum of its proper divisors (698213548).

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

420402132 is a wasteful number, since it uses less digits than its factorization.

420402132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614652 (or 614647 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 420402132 is about 20503.7102008393. The cubic root of 420402132 is about 749.1261716274.

Adding to 420402132 its reverse (231204024), we get a palindrome (651606156).

The spelling of 420402132 in words is "four hundred twenty million, four hundred two thousand, one hundred thirty-two".