423751240 has 64 divisors (see below), whose sum is σ = 1064352960. Its totient is φ = 150501120.

The previous prime is 423751199. The next prime is 423751247. The reversal of 423751240 is 42157324.

It is a super-2 number, since 2×423751240² = 359130226803075200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 423751199 and 423751208.

It is not an unprimeable number, because it can be changed into a prime (423751247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7722 + ... + 30118.

It is an arithmetic number, because the mean of its divisors is an integer number (16630515).

Almost surely, 2^423751240 is an apocalyptic number.

423751240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423751240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (532176480).

423751240 is an abundant number, since it is smaller than the sum of its proper divisors (640601720).

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

423751240 is a wasteful number, since it uses less digits than its factorization.

423751240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22462 (or 22458 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 423751240 is about 20585.2189689593. The cubic root of 423751240 is about 751.1102017179.

The spelling of 423751240 in words is "four hundred twenty-three million, seven hundred fifty-one thousand, two hundred forty".