422431240 has 64 divisors (see below), whose sum is σ = 1185010560. Its totient is φ = 131665920.

The previous prime is 422431231. The next prime is 422431267. The reversal of 422431240 is 42134224.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65497 + ... + 71656.

It is an arithmetic number, because the mean of its divisors is an integer number (18515790).

Almost surely, 2^422431240 is an apocalyptic number.

422431240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

422431240 is an abundant number, since it is smaller than the sum of its proper divisors (762579320).

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

422431240 is a wasteful number, since it uses less digits than its factorization.

422431240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137182 (or 137178 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 422431240 is about 20553.1321214067. The cubic root of 422431240 is about 750.3294789407.

Adding to 422431240 its reverse (42134224), we get a palindrome (464565464).

The spelling of 422431240 in words is "four hundred twenty-two million, four hundred thirty-one thousand, two hundred forty".