405555000 has 160 divisors (see below), whose sum is σ = 1334572800. Its totient is φ = 102384000.

The previous prime is 405554999. The next prime is 405555001. The reversal of 405555000 is 555504.

It is an interprime number because it is at equal distance from previous prime (405554999) and next prime (405555001).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405555001) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 284289 + ... + 285711.

It is an arithmetic number, because the mean of its divisors is an integer number (8341080).

Almost surely, 2^405555000 is an apocalyptic number.

405555000 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 405555000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (667286400).

405555000 is an abundant number, since it is smaller than the sum of its proper divisors (929017800).

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

405555000 is a wasteful number, since it uses less digits than its factorization.

405555000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471 (or 1452 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 24.

The square root of 405555000 is about 20138.3961625548. The cubic root of 405555000 is about 740.2014304341.

The spelling of 405555000 in words is "four hundred five million, five hundred fifty-five thousand".