423156500 has 48 divisors (see below), whose sum is σ = 995279376. Its totient is φ = 156240000.

The previous prime is 423156499. The next prime is 423156509. The reversal of 423156500 is 5651324.

It can be written as a sum of positive squares in 8 ways, for example, as 138627076 + 284529424 = 11774^2 + 16868^2 .

It is a super-2 number, since 2×423156500² = 358122846984500000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 423156500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423156509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26051 + ... + 39050.

It is an arithmetic number, because the mean of its divisors is an integer number (20734987).

Almost surely, 2^423156500 is an apocalyptic number.

It is an amenable number.

423156500 is an abundant number, since it is smaller than the sum of its proper divisors (572122876).

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

423156500 is a wasteful number, since it uses less digits than its factorization.

423156500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65133 (or 65121 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 423156500 is about 20570.7680945559. The cubic root of 423156500 is about 750.7586397696.

The spelling of 423156500 in words is "four hundred twenty-three million, one hundred fifty-six thousand, five hundred".