40878251 has 8 divisors (see below), whose sum is σ = 44290224. Its totient is φ = 37578240.

The previous prime is 40878239. The next prime is 40878269. The reversal of 40878251 is 15287804.

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

It is a cyclic number.

It is not a de Polignac number, because 40878251 - 2¹⁴ = 40861867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40878221) 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, 27230 + ... + 28691.

It is an arithmetic number, because the mean of its divisors is an integer number (5536278).

Almost surely, 2^40878251 is an apocalyptic number.

40878251 is a deficient number, since it is larger than the sum of its proper divisors (3411973).

40878251 is a wasteful number, since it uses less digits than its factorization.

40878251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55981.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 40878251 is about 6393.6101695365. The cubic root of 40878251 is about 344.4800710018.

The spelling of 40878251 in words is "forty million, eight hundred seventy-eight thousand, two hundred fifty-one".