421263240 has 64 divisors (see below), whose sum is σ = 1276853760. Its totient is φ = 111175680.

The previous prime is 421263229. The next prime is 421263287. The reversal of 421263240 is 42362124.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 421263240.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6456 + ... + 29735.

It is an arithmetic number, because the mean of its divisors is an integer number (19950840).

Almost surely, 2^421263240 is an apocalyptic number.

421263240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421263240 is an abundant number, since it is smaller than the sum of its proper divisors (855590520).

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

421263240 is a wasteful number, since it uses less digits than its factorization.

421263240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36302 (or 36298 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 421263240 is about 20524.6982925450. The cubic root of 421263240 is about 749.6373001823.

The spelling of 421263240 in words is "four hundred twenty-one million, two hundred sixty-three thousand, two hundred forty".