423597780 has 144 divisors (see below), whose sum is σ = 1399507200. Its totient is φ = 103299840.

The previous prime is 423597767. The next prime is 423597781. The reversal of 423597780 is 87795324.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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 (423597781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 97045 + ... + 101315.

It is an arithmetic number, because the mean of its divisors is an integer number (9718800).

Almost surely, 2^423597780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423597780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (699753600).

423597780 is an abundant number, since it is smaller than the sum of its proper divisors (975909420).

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

423597780 is a wasteful number, since it uses less digits than its factorization.

423597780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4334 (or 4329 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 423597780 is about 20581.4911996191. The cubic root of 423597780 is about 751.0195201436.

The spelling of 423597780 in words is "four hundred twenty-three million, five hundred ninety-seven thousand, seven hundred eighty".