40279285 has 4 divisors (see below), whose sum is σ = 48335148. Its totient is φ = 32223424.

The previous prime is 40279277. The next prime is 40279313. The reversal of 40279285 is 58297204.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13972644 + 26306641 = 3738^2 + 5129^2 .

It is a cyclic number.

It is not a de Polignac number, because 40279285 - 2³ = 40279277 is a prime.

It is a super-2 number, since 2×40279285² = 3244841600222450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4027924 + ... + 4027933.

It is an arithmetic number, because the mean of its divisors is an integer number (12083787).

Almost surely, 2^40279285 is an apocalyptic number.

It is an amenable number.

40279285 is a deficient number, since it is larger than the sum of its proper divisors (8055863).

40279285 is an equidigital number, since it uses as much as digits as its factorization.

40279285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8055862.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 40279285 is about 6346.5963318932. The cubic root of 40279285 is about 342.7892950649.

The spelling of 40279285 in words is "forty million, two hundred seventy-nine thousand, two hundred eighty-five".