40286397 has 8 divisors (see below), whose sum is σ = 53809056. Its totient is φ = 26810672.

The previous prime is 40286387. The next prime is 40286401. The reversal of 40286397 is 79368204.

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 40286397 - 2⁴ = 40286381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40286387) 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, 9678 + ... + 13199.

It is an arithmetic number, because the mean of its divisors is an integer number (6726132).

Almost surely, 2^40286397 is an apocalyptic number.

It is an amenable number.

40286397 is a deficient number, since it is larger than the sum of its proper divisors (13522659).

40286397 is a wasteful number, since it uses less digits than its factorization.

40286397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23467.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 40286397 is about 6347.1566074897. The cubic root of 40286397 is about 342.8094689914.

The spelling of 40286397 in words is "forty million, two hundred eighty-six thousand, three hundred ninety-seven".