40378964 has 12 divisors (see below), whose sum is σ = 70865844. Its totient is φ = 20131584.

The previous prime is 40378939. The next prime is 40378967. The reversal of 40378964 is 46987304.

It can be written as a sum of positive squares in 2 ways, for example, as 31922500 + 8456464 = 5650^2 + 2908^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40378967) 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, 12887 + ... + 15710.

It is an arithmetic number, because the mean of its divisors is an integer number (5905487).

Almost surely, 2^40378964 is an apocalyptic number.

It is an amenable number.

40378964 is a deficient number, since it is larger than the sum of its proper divisors (30486880).

40378964 is a wasteful number, since it uses less digits than its factorization.

40378964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28954 (or 28952 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 40378964 is about 6354.4444289017. Note that the first 4 decimals coincide. The cubic root of 40378964 is about 343.0718286050.

The spelling of 40378964 in words is "forty million, three hundred seventy-eight thousand, nine hundred sixty-four".