420023624 has 32 divisors (see below), whose sum is σ = 837112320. Its totient is φ = 196889856.

The previous prime is 420023623. The next prime is 420023683. The reversal of 420023624 is 426320024.

It is a self number, because there is not a number n which added to its sum of digits gives 420023624.

It is not an unprimeable number, because it can be changed into a prime (420023621) 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, 29897 + ... + 41639.

It is an arithmetic number, because the mean of its divisors is an integer number (26159760).

Almost surely, 2^420023624 is an apocalyptic number.

It is an amenable number.

420023624 is a deficient number, since it is larger than the sum of its proper divisors (417088696).

420023624 is a wasteful number, since it uses less digits than its factorization.

420023624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12029 (or 12025 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 420023624 is about 20494.4778903977. The cubic root of 420023624 is about 748.9012795000.

Adding to 420023624 its reverse (426320024), we get a palindrome (846343648).

The spelling of 420023624 in words is "four hundred twenty million, twenty-three thousand, six hundred twenty-four".