40705751 has 4 divisors (see below), whose sum is σ = 40888512. Its totient is φ = 40522992.

The previous prime is 40705711. The next prime is 40705787. The reversal of 40705751 is 15750704.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40705751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40705711) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91046 + ... + 91491.

It is an arithmetic number, because the mean of its divisors is an integer number (10222128).

Almost surely, 2^40705751 is an apocalyptic number.

40705751 is a deficient number, since it is larger than the sum of its proper divisors (182761).

40705751 is a wasteful number, since it uses less digits than its factorization.

40705751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182760.

The product of its (nonzero) digits is 4900, while the sum is 29.

The square root of 40705751 is about 6380.1058768644. The cubic root of 40705751 is about 343.9948366586.

The spelling of 40705751 in words is "forty million, seven hundred five thousand, seven hundred fifty-one".