423557442 has 48 divisors (see below), whose sum is σ = 1144158912. Its totient is φ = 110014560.

The previous prime is 423557437. The next prime is 423557471. The reversal of 423557442 is 244755324.

423557442 is a `hidden beast` number, since 42 + 3 + 5 + 574 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 423557397 and 423557406.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 151413 + ... + 154184.

It is an arithmetic number, because the mean of its divisors is an integer number (23836644).

Almost surely, 2^423557442 is an apocalyptic number.

423557442 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

423557442 is an abundant number, since it is smaller than the sum of its proper divisors (720601470).

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

423557442 is a wasteful number, since it uses less digits than its factorization.

423557442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305623 (or 305620 counting only the distinct ones).

The product of its digits is 134400, while the sum is 36.

The square root of 423557442 is about 20580.5112181403. The cubic root of 423557442 is about 750.9956802429.

The spelling of 423557442 in words is "four hundred twenty-three million, five hundred fifty-seven thousand, four hundred forty-two".