424020840 has 64 divisors (see below), whose sum is σ = 1299144960. Its totient is φ = 110664960.

The previous prime is 424020833. The next prime is 424020841. The reversal of 424020840 is 48020424.

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 424020840.

It is not an unprimeable number, because it can be changed into a prime (424020841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31951 + ... + 43230.

It is an arithmetic number, because the mean of its divisors is an integer number (20299140).

Almost surely, 2^424020840 is an apocalyptic number.

424020840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

424020840 is an abundant number, since it is smaller than the sum of its proper divisors (875124120).

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

424020840 is a wasteful number, since it uses less digits than its factorization.

424020840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75242 (or 75238 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 424020840 is about 20591.7663156904. The cubic root of 424020840 is about 751.2694589751.

The spelling of 424020840 in words is "four hundred twenty-four million, twenty thousand, eight hundred forty".