424442640 has 80 divisors (see below), whose sum is σ = 1317790656. Its totient is φ = 113011200.

The previous prime is 424442633. The next prime is 424442657. The reversal of 424442640 is 46244424.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 424442598 and 424442607.

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 15 ways as a sum of consecutive naturals, for example, 261030 + ... + 262650.

Almost surely, 2^424442640 is an apocalyptic number.

424442640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

424442640 is an abundant number, since it is smaller than the sum of its proper divisors (893348016).

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

424442640 is a wasteful number, since it uses less digits than its factorization.

424442640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2728 (or 2722 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 30.

The square root of 424442640 is about 20602.0057275985. The cubic root of 424442640 is about 751.5184879620.

The spelling of 424442640 in words is "four hundred twenty-four million, four hundred forty-two thousand, six hundred forty".