40378688 has 56 divisors (see below), whose sum is σ = 92244672. Its totient is φ = 17178624.

The previous prime is 40378669. The next prime is 40378703. The reversal of 40378688 is 88687304.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86231 + ... + 86697.

Almost surely, 2^40378688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40378688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46122336).

40378688 is an abundant number, since it is smaller than the sum of its proper divisors (51865984).

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

40378688 is a wasteful number, since it uses less digits than its factorization.

40378688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679 (or 669 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 40378688 is about 6354.4227117811. The cubic root of 40378688 is about 343.0710469436.

The spelling of 40378688 in words is "forty million, three hundred seventy-eight thousand, six hundred eighty-eight".