420346632 has 32 divisors (see below), whose sum is σ = 1059148800. Its totient is φ = 139011264.

The previous prime is 420346631. The next prime is 420346649. The reversal of 420346632 is 236643024.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 420346632.

It is not an unprimeable number, because it can be changed into a prime (420346631) 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, 65907 + ... + 72002.

It is an arithmetic number, because the mean of its divisors is an integer number (33098400).

Almost surely, 2^420346632 is an apocalyptic number.

It is an amenable number.

420346632 is an abundant number, since it is smaller than the sum of its proper divisors (638802168).

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

420346632 is a wasteful number, since it uses less digits than its factorization.

420346632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138045 (or 138041 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 30.

The square root of 420346632 is about 20502.3567425796. The cubic root of 420346632 is about 749.0932045156.

Adding to 420346632 its reverse (236643024), we get a palindrome (656989656).

The spelling of 420346632 in words is "four hundred twenty million, three hundred forty-six thousand, six hundred thirty-two".