605387406 has 48 divisors (see below), whose sum is σ = 1353438720. Its totient is φ = 180254880.

The previous prime is 605387389. The next prime is 605387407. The reversal of 605387406 is 604783506.

It is a super-2 number, since 2×605387406² = 732987822686817672, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) 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 (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (605387407) 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, 21805 + ... + 41063.

It is an arithmetic number, because the mean of its divisors is an integer number (28196640).

Almost surely, 2^605387406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 605387406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (676719360).

605387406 is an abundant number, since it is smaller than the sum of its proper divisors (748051314).

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

605387406 is a wasteful number, since it uses less digits than its factorization.

605387406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19321 (or 19308 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 605387406 is about 24604.6216390336. The cubic root of 605387406 is about 845.9495440179.

The spelling of 605387406 in words is "six hundred five million, three hundred eighty-seven thousand, four hundred six".