204402423240 has 256 divisors, whose sum is σ = 711461836800. Its totient is φ = 52101004032.

The previous prime is 204402423233. The next prime is 204402423271. The reversal of 204402423240 is 42324204402.

204402423240 is a `hidden beast` number, since 20 + 4 + 402 + 4 + 232 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 66644187 + ... + 66647253.

It is an arithmetic number, because the mean of its divisors is an integer number (2779147800).

Almost surely, 2^204402423240 is an apocalyptic number.

204402423240 is a gapful number since it is divisible by the number (20) 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 204402423240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (355730918400).

204402423240 is an abundant number, since it is smaller than the sum of its proper divisors (507059413560).

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

204402423240 is a wasteful number, since it uses less digits than its factorization.

204402423240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5793 (or 5783 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 27.

Adding to 204402423240 its reverse (42324204402), we get a palindrome (246726627642).

The spelling of 204402423240 in words is "two hundred four billion, four hundred two million, four hundred twenty-three thousand, two hundred forty".