40712789 has 8 divisors (see below), whose sum is σ = 44035992. Its totient is φ = 37416960.

The previous prime is 40712779. The next prime is 40712809. The reversal of 40712789 is 98721704.

It can be written as a sum of positive squares in 4 ways, for example, as 1085764 + 39627025 = 1042^2 + 6295^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40712789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40712779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3692 + ... + 9749.

It is an arithmetic number, because the mean of its divisors is an integer number (5504499).

Almost surely, 2^40712789 is an apocalyptic number.

It is an amenable number.

40712789 is a deficient number, since it is larger than the sum of its proper divisors (3323203).

40712789 is a wasteful number, since it uses less digits than its factorization.

40712789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13687.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 40712789 is about 6380.6574112704. The cubic root of 40712789 is about 344.0146610166.

The spelling of 40712789 in words is "forty million, seven hundred twelve thousand, seven hundred eighty-nine".