424205640 has 128 divisors (see below), whose sum is σ = 1440892800. Its totient is φ = 110972160.

The previous prime is 424205599. The next prime is 424205653. The reversal of 424205640 is 46502424.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53535 + ... + 60945.

It is an arithmetic number, because the mean of its divisors is an integer number (11256975).

Almost surely, 2^424205640 is an apocalyptic number.

424205640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 424205640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (720446400).

424205640 is an abundant number, since it is smaller than the sum of its proper divisors (1016687160).

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

424205640 is a wasteful number, since it uses less digits than its factorization.

424205640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7484 (or 7474 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 424205640 is about 20596.2530572918. The cubic root of 424205640 is about 751.3785844539.

The spelling of 424205640 in words is "four hundred twenty-four million, two hundred five thousand, six hundred forty".