40396878 has 24 divisors (see below), whose sum is σ = 91333008. Its totient is φ = 12880032.

The previous prime is 40396877. The next prime is 40396883. The reversal of 40396878 is 87869304.

It is a happy number.

It is a super-4 number, since 4×40396878⁴ (a number of 32 digits) contains 4444 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40396871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48375 + ... + 49202.

It is an arithmetic number, because the mean of its divisors is an integer number (3805542).

Almost surely, 2^40396878 is an apocalyptic number.

40396878 is an abundant number, since it is smaller than the sum of its proper divisors (50936130).

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

40396878 is a wasteful number, since it uses less digits than its factorization.

40396878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97608 (or 97605 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 40396878 is about 6355.8538372118. The cubic root of 40396878 is about 343.1225553490.

The spelling of 40396878 in words is "forty million, three hundred ninety-six thousand, eight hundred seventy-eight".