423129440 has 48 divisors (see below), whose sum is σ = 1001911680. Its totient is φ = 168867840.

The previous prime is 423129433. The next prime is 423129461. The reversal of 423129440 is 44921324.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73880 + ... + 79400.

It is an arithmetic number, because the mean of its divisors is an integer number (20873160).

Almost surely, 2^423129440 is an apocalyptic number.

423129440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

423129440 is an abundant number, since it is smaller than the sum of its proper divisors (578782240).

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

423129440 is a wasteful number, since it uses less digits than its factorization.

423129440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6015 (or 6007 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 423129440 is about 20570.1103545897. The cubic root of 423129440 is about 750.7426362643.

The spelling of 423129440 in words is "four hundred twenty-three million, one hundred twenty-nine thousand, four hundred forty".