423660990 has 32 divisors (see below), whose sum is σ = 1020016800. Its totient is φ = 112617344.

The previous prime is 423660953. The next prime is 423660997. The reversal of 423660990 is 99066324.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423660997) 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, 12765 + ... + 31784.

It is an arithmetic number, because the mean of its divisors is an integer number (31875525).

Almost surely, 2^423660990 is an apocalyptic number.

423660990 is an abundant number, since it is smaller than the sum of its proper divisors (596355810).

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

423660990 is a wasteful number, since it uses less digits than its factorization.

423660990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44876.

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 423660990 is about 20583.0267453550. The cubic root of 423660990 is about 751.0568744335.

The spelling of 423660990 in words is "four hundred twenty-three million, six hundred sixty thousand, nine hundred ninety".