405464636 has 12 divisors (see below), whose sum is σ = 746908680. Its totient is φ = 192062160.

The previous prime is 405464627. The next prime is 405464639. The reversal of 405464636 is 636464504.

It is a happy number.

It is a super-2 number, since 2×405464636² = 328803142093224992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a self number, because there is not a number n which added to its sum of digits gives 405464636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405464639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2667455 + ... + 2667606.

It is an arithmetic number, because the mean of its divisors is an integer number (62242390).

Almost surely, 2^405464636 is an apocalyptic number.

It is an amenable number.

405464636 is a deficient number, since it is larger than the sum of its proper divisors (341444044).

405464636 is a wasteful number, since it uses less digits than its factorization.

405464636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5335084 (or 5335082 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 38.

The square root of 405464636 is about 20136.1524626727. The cubic root of 405464636 is about 740.1464501966.

The spelling of 405464636 in words is "four hundred five million, four hundred sixty-four thousand, six hundred thirty-six".