40878387 has 48 divisors (see below), whose sum is σ = 69144192. Its totient is φ = 22997760.

The previous prime is 40878361. The next prime is 40878389. The reversal of 40878387 is 78387804.

It is not a de Polignac number, because 40878387 - 2¹² = 40874291 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40878389) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 179968 + ... + 180194.

It is an arithmetic number, because the mean of its divisors is an integer number (1440504).

Almost surely, 2^40878387 is an apocalyptic number.

40878387 is a deficient number, since it is larger than the sum of its proper divisors (28265805).

40878387 is a wasteful number, since it uses less digits than its factorization.

40878387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 365 counting only the distinct ones).

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

The square root of 40878387 is about 6393.6208051463. The cubic root of 40878387 is about 344.4804530243.

The spelling of 40878387 in words is "forty million, eight hundred seventy-eight thousand, three hundred eighty-seven".