40878231 has 8 divisors (see below), whose sum is σ = 54631920. Its totient is φ = 27188352.

The previous prime is 40878221. The next prime is 40878239. The reversal of 40878231 is 13287804.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40878231 - 2¹⁷ = 40747159 is a prime.

It is a super-2 number, since 2×40878231² = 3342059539378722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40878192 and 40878201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40878239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14436 + ... + 17033.

It is an arithmetic number, because the mean of its divisors is an integer number (6828990).

Almost surely, 2^40878231 is an apocalyptic number.

40878231 is a deficient number, since it is larger than the sum of its proper divisors (13753689).

40878231 is a wasteful number, since it uses less digits than its factorization.

40878231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31905.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 40878231 is about 6393.6086054747. The cubic root of 40878231 is about 344.4800148220.

The spelling of 40878231 in words is "forty million, eight hundred seventy-eight thousand, two hundred thirty-one".