40385844 has 24 divisors (see below), whose sum is σ = 104704320. Its totient is φ = 13461912.

The previous prime is 40385837. The next prime is 40385857. The reversal of 40385844 is 44858304.

40385844 is a `hidden beast` number, since 40 + 38 + 584 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 40385799 and 40385808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186864 + ... + 187079.

It is an arithmetic number, because the mean of its divisors is an integer number (4362680).

Almost surely, 2^40385844 is an apocalyptic number.

It is an amenable number.

40385844 is an abundant number, since it is smaller than the sum of its proper divisors (64318476).

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

40385844 is a wasteful number, since it uses less digits than its factorization.

40385844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373956 (or 373948 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 36.

The square root of 40385844 is about 6354.9857592287. The cubic root of 40385844 is about 343.0913123486.

The spelling of 40385844 in words is "forty million, three hundred eighty-five thousand, eight hundred forty-four".