40397948 has 12 divisors (see below), whose sum is σ = 70979832. Its totient is φ = 20118000.

The previous prime is 40397947. The next prime is 40397953. The reversal of 40397948 is 84979304.

40397948 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×40397948² = 3263988405221408, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40397899 and 40397908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40397947) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 19115 + ... + 21122.

It is an arithmetic number, because the mean of its divisors is an integer number (5914986).

Almost surely, 2^40397948 is an apocalyptic number.

It is an amenable number.

40397948 is a deficient number, since it is larger than the sum of its proper divisors (30581884).

40397948 is a wasteful number, since it uses less digits than its factorization.

40397948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40492 (or 40490 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 40397948 is about 6355.9380110256. The cubic root of 40397948 is about 343.1255847737.

The spelling of 40397948 in words is "forty million, three hundred ninety-seven thousand, nine hundred forty-eight".