40379281 has 8 divisors (see below), whose sum is σ = 41976000. Its totient is φ = 38796240.

The previous prime is 40379263. The next prime is 40379291. The reversal of 40379281 is 18297304.

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 40379281 - 2⁷ = 40379153 is a prime.

It is a super-2 number, since 2×40379281² = 3260972668153922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40379231) 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, 2820 + ... + 9418.

It is an arithmetic number, because the mean of its divisors is an integer number (5247000).

Almost surely, 2^40379281 is an apocalyptic number.

It is an amenable number.

40379281 is a deficient number, since it is larger than the sum of its proper divisors (1596719).

40379281 is a wasteful number, since it uses less digits than its factorization.

40379281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6839.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 40379281 is about 6354.4693720247. The cubic root of 40379281 is about 343.0727263785.

The spelling of 40379281 in words is "forty million, three hundred seventy-nine thousand, two hundred eighty-one".