40838778 has 24 divisors (see below), whose sum is σ = 89807328. Its totient is φ = 13409352.

The previous prime is 40838767. The next prime is 40838783. The reversal of 40838778 is 87783804.

It is a super-3 number, since 3×40838778³ (a number of 24 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15726 + ... + 18137.

It is an arithmetic number, because the mean of its divisors is an integer number (3741972).

Almost surely, 2^40838778 is an apocalyptic number.

40838778 is an abundant number, since it is smaller than the sum of its proper divisors (48968550).

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

40838778 is a wasteful number, since it uses less digits than its factorization.

40838778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33938 (or 33935 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The square root of 40838778 is about 6390.5225138481. The cubic root of 40838778 is about 344.3691559423.

It can be divided in two parts, 40838 and 778, that added together give a triangular number (41616 = T₂₈₈).

The spelling of 40838778 in words is "forty million, eight hundred thirty-eight thousand, seven hundred seventy-eight".