421310340 has 144 divisors (see below), whose sum is σ = 1400293440. Its totient is φ = 101687040.

The previous prime is 421310339. The next prime is 421310363. The reversal of 421310340 is 43013124.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 769947 + ... + 770493.

It is an arithmetic number, because the mean of its divisors is an integer number (9724260).

Almost surely, 2^421310340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421310340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (700146720).

421310340 is an abundant number, since it is smaller than the sum of its proper divisors (978983100).

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

421310340 is a wasteful number, since it uses less digits than its factorization.

421310340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962 (or 957 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 421310340 is about 20525.8456585837. The cubic root of 421310340 is about 749.6652372674.

Adding to 421310340 its reverse (43013124), we get a palindrome (464323464).

The spelling of 421310340 in words is "four hundred twenty-one million, three hundred ten thousand, three hundred forty".