40257992 has 8 divisors (see below), whose sum is σ = 75483750. Its totient is φ = 20128992.

The previous prime is 40257983. The next prime is 40258013. The reversal of 40257992 is 29975204.

It can be written as a sum of positive squares in only one way, i.e., 39363076 + 894916 = 6274^2 + 946^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2516117 + ... + 2516132.

Almost surely, 2^40257992 is an apocalyptic number.

It is an amenable number.

40257992 is a deficient number, since it is larger than the sum of its proper divisors (35225758).

40257992 is a wasteful number, since it uses less digits than its factorization.

40257992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5032255 (or 5032251 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 40257992 is about 6344.9185967985. The cubic root of 40257992 is about 342.7288810580.

The spelling of 40257992 in words is "forty million, two hundred fifty-seven thousand, nine hundred ninety-two".