40397047 has 8 divisors (see below), whose sum is σ = 41126400. Its totient is φ = 39671544.

The previous prime is 40397009. The next prime is 40397051. The reversal of 40397047 is 74079304.

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 40397047 - 2¹⁵ = 40364279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40397447) 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, 27354 + ... + 28792.

It is an arithmetic number, because the mean of its divisors is an integer number (5140800).

Almost surely, 2^40397047 is an apocalyptic number.

40397047 is a deficient number, since it is larger than the sum of its proper divisors (729353).

40397047 is a wasteful number, since it uses less digits than its factorization.

40397047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1925.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 40397047 is about 6355.8671320285. The cubic root of 40397047 is about 343.1230338318.

The spelling of 40397047 in words is "forty million, three hundred ninety-seven thousand, forty-seven".