405874672 has 20 divisors (see below), whose sum is σ = 898722736. Its totient is φ = 173946240.

The previous prime is 405874639. The next prime is 405874681. The reversal of 405874672 is 276478504.

It is a super-2 number, since 2×405874672² = 329468498742215168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1811829 + ... + 1812052.

Almost surely, 2^405874672 is an apocalyptic number.

It is an amenable number.

405874672 is an abundant number, since it is smaller than the sum of its proper divisors (492848064).

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

405874672 is a wasteful number, since it uses less digits than its factorization.

405874672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3623896 (or 3623890 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 43.

The square root of 405874672 is about 20146.3314774676. The cubic root of 405874672 is about 740.3958631890.

The spelling of 405874672 in words is "four hundred five million, eight hundred seventy-four thousand, six hundred seventy-two".