421740024 has 64 divisors (see below), whose sum is σ = 1095206400. Its totient is φ = 135235584.

The previous prime is 421740013. The next prime is 421740037. The reversal of 421740024 is 420047124.

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

It is a junction number, because it is equal to n+sod(n) for n = 421739976 and 421740003.

It is a congruent number.

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, 63384 + ... + 69720.

It is an arithmetic number, because the mean of its divisors is an integer number (17112600).

Almost surely, 2^421740024 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 421740024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (547603200).

421740024 is an abundant number, since it is smaller than the sum of its proper divisors (673466376).

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

421740024 is a wasteful number, since it uses less digits than its factorization.

421740024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6452 (or 6448 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 24.

The square root of 421740024 is about 20536.3098924807. The cubic root of 421740024 is about 749.9200056904.

Adding to 421740024 its reverse (420047124), we get a palindrome (841787148).

The spelling of 421740024 in words is "four hundred twenty-one million, seven hundred forty thousand, twenty-four".