423621740 has 12 divisors (see below), whose sum is σ = 889605696. Its totient is φ = 169448688.

The previous prime is 423621733. The next prime is 423621743. The reversal of 423621740 is 47126324.

It is not an unprimeable number, because it can be changed into a prime (423621743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10590524 + ... + 10590563.

It is an arithmetic number, because the mean of its divisors is an integer number (74133808).

Almost surely, 2^423621740 is an apocalyptic number.

It is an amenable number.

423621740 is an abundant number, since it is smaller than the sum of its proper divisors (465983956).

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

423621740 is a wasteful number, since it uses less digits than its factorization.

423621740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21181096 (or 21181094 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 423621740 is about 20582.0732677736. The cubic root of 423621740 is about 751.0336798719.

The spelling of 423621740 in words is "four hundred twenty-three million, six hundred twenty-one thousand, seven hundred forty".