40397072 has 10 divisors (see below), whose sum is σ = 78269358. Its totient is φ = 20198528.

The previous prime is 40397069. The next prime is 40397089. The reversal of 40397072 is 27079304.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20647936 + 19749136 = 4544^2 + 4444^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1262393 + ... + 1262424.

Almost surely, 2^40397072 is an apocalyptic number.

It is an amenable number.

40397072 is a deficient number, since it is larger than the sum of its proper divisors (37872286).

40397072 is a wasteful number, since it uses less digits than its factorization.

40397072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2524825 (or 2524819 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 40397072 is about 6355.8690987150. The cubic root of 40397072 is about 343.1231046132.

It can be divided in two parts, 4039 and 7072, that added together give a palindrome (11111).

The spelling of 40397072 in words is "forty million, three hundred ninety-seven thousand, seventy-two".