405236412 has 96 divisors (see below), whose sum is σ = 1271370240. Its totient is φ = 108967680.

The previous prime is 405236407. The next prime is 405236423. The reversal of 405236412 is 214632504.

It is a super-2 number, since 2×405236412² = 328433099221267488, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2914 + ... + 28617.

It is an arithmetic number, because the mean of its divisors is an integer number (13243440).

Almost surely, 2^405236412 is an apocalyptic number.

405236412 is a gapful number since it is divisible by the number (42) 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 405236412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (635685120).

405236412 is an abundant number, since it is smaller than the sum of its proper divisors (866133828).

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

405236412 is a wasteful number, since it uses less digits than its factorization.

405236412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31568 (or 31560 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 405236412 is about 20130.4846439424. The cubic root of 405236412 is about 740.0075553161.

Adding to 405236412 its reverse (214632504), we get a palindrome (619868916).

The spelling of 405236412 in words is "four hundred five million, two hundred thirty-six thousand, four hundred twelve".