40256966 has 4 divisors (see below), whose sum is σ = 60385452. Its totient is φ = 20128482.

The previous prime is 40256963. The next prime is 40256971. The reversal of 40256966 is 66965204.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40256963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10064240 + ... + 10064243.

It is an arithmetic number, because the mean of its divisors is an integer number (15096363).

Almost surely, 2^40256966 is an apocalyptic number.

40256966 is a deficient number, since it is larger than the sum of its proper divisors (20128486).

40256966 is a wasteful number, since it uses less digits than its factorization.

40256966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20128485.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 40256966 is about 6344.8377441823. The cubic root of 40256966 is about 342.7259694803.

The spelling of 40256966 in words is "forty million, two hundred fifty-six thousand, nine hundred sixty-six".