421430664 has 32 divisors (see below), whose sum is σ = 1065420000. Its totient is φ = 138897792.

The previous prime is 421430657. The next prime is 421430671. The reversal of 421430664 is 466034124.

It is an interprime number because it is at equal distance from previous prime (421430657) and next prime (421430671).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96514 + ... + 100785.

It is an arithmetic number, because the mean of its divisors is an integer number (33294375).

Almost surely, 2^421430664 is an apocalyptic number.

It is an amenable number.

421430664 is an abundant number, since it is smaller than the sum of its proper divisors (643989336).

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

421430664 is a wasteful number, since it uses less digits than its factorization.

421430664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197397 (or 197393 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 421430664 is about 20528.7764857042. The cubic root of 421430664 is about 749.7365972806.

Adding to 421430664 its reverse (466034124), we get a palindrome (887464788).

The spelling of 421430664 in words is "four hundred twenty-one million, four hundred thirty thousand, six hundred sixty-four".