423509940 has 108 divisors (see below), whose sum is σ = 1494416196. Its totient is φ = 96800256.

The previous prime is 423509929. The next prime is 423509963. The reversal of 423509940 is 49905324.

It can be written as a sum of positive squares in 2 ways, for example, as 109369764 + 314140176 = 10458^2 + 17724^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 423509895 and 423509904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 15189 + ... + 32828.

It is an arithmetic number, because the mean of its divisors is an integer number (13837187).

Almost surely, 2^423509940 is an apocalyptic number.

It is an amenable number.

423509940 is an abundant number, since it is smaller than the sum of its proper divisors (1070906256).

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

423509940 is a wasteful number, since it uses less digits than its factorization.

423509940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48046 (or 48034 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 423509940 is about 20579.3571328164. The cubic root of 423509940 is about 750.9676044520.

The spelling of 423509940 in words is "four hundred twenty-three million, five hundred nine thousand, nine hundred forty".