423256227840 has 384 divisors, whose sum is σ = 1474631870400. Its totient is φ = 112302489600.

The previous prime is 423256227809. The next prime is 423256227841. The reversal of 423256227840 is 48722652324.

423256227840 is a `hidden beast` number, since 4 + 2 + 3 + 2 + 562 + 2 + 7 + 84 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423256227841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 352419240 + ... + 352420440.

Almost surely, 2^423256227840 is an apocalyptic number.

423256227840 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 423256227840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (737315935200).

423256227840 is an abundant number, since it is smaller than the sum of its proper divisors (1051375642560).

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

423256227840 is a wasteful number, since it uses less digits than its factorization.

423256227840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481 (or 1450 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 45.

The spelling of 423256227840 in words is "four hundred twenty-three billion, two hundred fifty-six million, two hundred twenty-seven thousand, eight hundred forty".