40997738 has 4 divisors (see below), whose sum is σ = 61496610. Its totient is φ = 20498868.

The previous prime is 40997689. The next prime is 40997777. The reversal of 40997738 is 83779904.

40997738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 39526369 + 1471369 = 6287^2 + 1213^2 .

It is a super-2 number, since 2×40997738² = 3361629042233288, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40997692 and 40997701.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10249433 + ... + 10249436.

Almost surely, 2^40997738 is an apocalyptic number.

40997738 is a deficient number, since it is larger than the sum of its proper divisors (20498872).

40997738 is a wasteful number, since it uses less digits than its factorization.

40997738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20498871.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 40997738 is about 6402.9476024718. The cubic root of 40997738 is about 344.8153825660.

The spelling of 40997738 in words is "forty million, nine hundred ninety-seven thousand, seven hundred thirty-eight".