424020440 has 32 divisors (see below), whose sum is σ = 965548080. Its totient is φ = 167563392.

The previous prime is 424020437. The next prime is 424020469. The reversal of 424020440 is 44020424.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60539 + ... + 67178.

Almost surely, 2^424020440 is an apocalyptic number.

424020440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

424020440 is an abundant number, since it is smaller than the sum of its proper divisors (541527640).

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

424020440 is a wasteful number, since it uses less digits than its factorization.

424020440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127811 (or 127807 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 424020440 is about 20591.7566030681. The cubic root of 424020440 is about 751.2692227384.

Adding to 424020440 its reverse (44020424), we get a palindrome (468040864).

The spelling of 424020440 in words is "four hundred twenty-four million, twenty thousand, four hundred forty".