421540380 has 72 divisors (see below), whose sum is σ = 1280806800. Its totient is φ = 112223232.

The previous prime is 421540363. The next prime is 421540411. The reversal of 421540380 is 83045124.

421540380 is a `hidden beast` number, since 42 + 1 + 540 + 3 + 80 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131436 + ... + 134604.

Almost surely, 2^421540380 is an apocalyptic number.

It is an amenable number.

421540380 is an abundant number, since it is smaller than the sum of its proper divisors (859266420).

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

421540380 is a wasteful number, since it uses less digits than its factorization.

421540380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3923 (or 3918 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 421540380 is about 20531.4485606837. The cubic root of 421540380 is about 749.8016542166.

The spelling of 421540380 in words is "four hundred twenty-one million, five hundred forty thousand, three hundred eighty".