421536040 has 32 divisors (see below), whose sum is σ = 959121000. Its totient is φ = 166718464.

The previous prime is 421536013. The next prime is 421536041. The reversal of 421536040 is 40635124.

It can be written as a sum of positive squares in 4 ways, for example, as 360164484 + 61371556 = 18978^2 + 7834^2 .

It is a junction number, because it is equal to n+sod(n) for n = 421535996 and 421536014.

It is not an unprimeable number, because it can be changed into a prime (421536041) 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, 55645 + ... + 62764.

Almost surely, 2^421536040 is an apocalyptic number.

421536040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421536040 is an abundant number, since it is smaller than the sum of its proper divisors (537584960).

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

421536040 is a wasteful number, since it uses less digits than its factorization.

421536040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118509 (or 118505 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 421536040 is about 20531.3428688919. The cubic root of 421536040 is about 749.7990809950.

The spelling of 421536040 in words is "four hundred twenty-one million, five hundred thirty-six thousand, forty".