423433640 has 64 divisors (see below), whose sum is σ = 1126396800. Its totient is φ = 140168448.

The previous prime is 423433631. The next prime is 423433649. The reversal of 423433640 is 46334324.

It is an interprime number because it is at equal distance from previous prime (423433631) and next prime (423433649).

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (423433649) 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, 17954 + ... + 34193.

It is an arithmetic number, because the mean of its divisors is an integer number (17599950).

Almost surely, 2^423433640 is an apocalyptic number.

423433640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

423433640 is an abundant number, since it is smaller than the sum of its proper divisors (702963160).

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

423433640 is a wasteful number, since it uses less digits than its factorization.

423433640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52194 (or 52190 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 29.

The square root of 423433640 is about 20577.5032499086. The cubic root of 423433640 is about 750.9225033700.

Adding to 423433640 its reverse (46334324), we get a palindrome (469767964).

The spelling of 423433640 in words is "four hundred twenty-three million, four hundred thirty-three thousand, six hundred forty".