40878878 has 4 divisors (see below), whose sum is σ = 61318320. Its totient is φ = 20439438.

The previous prime is 40878833. The next prime is 40878881. The reversal of 40878878 is 87887804.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10219718 + ... + 10219721.

It is an arithmetic number, because the mean of its divisors is an integer number (15329580).

Almost surely, 2^40878878 is an apocalyptic number.

40878878 is a deficient number, since it is larger than the sum of its proper divisors (20439442).

40878878 is a wasteful number, since it uses less digits than its factorization.

40878878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20439441.

The product of its (nonzero) digits is 802816, while the sum is 50.

The square root of 40878878 is about 6393.6592026789. The cubic root of 40878878 is about 344.4818322309.

The spelling of 40878878 in words is "forty million, eight hundred seventy-eight thousand, eight hundred seventy-eight".