421462640 has 40 divisors (see below), whose sum is σ = 1037545200. Its totient is φ = 158667776.

The previous prime is 421462619. The next prime is 421462687. The reversal of 421462640 is 46264124.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 153590 + ... + 156309.

It is an arithmetic number, because the mean of its divisors is an integer number (25938630).

Almost surely, 2^421462640 is an apocalyptic number.

421462640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421462640 is an abundant number, since it is smaller than the sum of its proper divisors (616082560).

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

421462640 is a wasteful number, since it uses less digits than its factorization.

421462640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309929 (or 309923 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 421462640 is about 20529.5552801321. Note that the first 3 decimals coincide. The cubic root of 421462640 is about 749.7555588585.

The spelling of 421462640 in words is "four hundred twenty-one million, four hundred sixty-two thousand, six hundred forty".