421169640 has 64 divisors (see below), whose sum is σ = 1265060160. Its totient is φ = 112174080.

The previous prime is 421169621. The next prime is 421169659. The reversal of 421169640 is 46961124.

It is an interprime number because it is at equal distance from previous prime (421169621) and next prime (421169659).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129312 + ... + 132528.

It is an arithmetic number, because the mean of its divisors is an integer number (19766565).

Almost surely, 2^421169640 is an apocalyptic number.

421169640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421169640 is an abundant number, since it is smaller than the sum of its proper divisors (843890520).

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

421169640 is a wasteful number, since it uses less digits than its factorization.

421169640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4322 (or 4318 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 421169640 is about 20522.4179861926. The cubic root of 421169640 is about 749.5817757168.

The spelling of 421169640 in words is "four hundred twenty-one million, one hundred sixty-nine thousand, six hundred forty".