40742689 has 9 divisors (see below), whose sum is σ = 44207859. Its totient is φ = 37532040.

The previous prime is 40742671. The next prime is 40742701. The reversal of 40742689 is 98624704.

The square root of 40742689 is 6383.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 6027025 + 34715664 = 2455^2 + 5892^2 .

It is not a de Polignac number, because 40742689 - 2⁵ = 40742657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40746689) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 82734 + ... + 83224.

Almost surely, 2^40742689 is an apocalyptic number.

40742689 is the 6383-rd square number.

40742689 is the 3192-nd centered octagonal number.

It is an amenable number.

40742689 is a deficient number, since it is larger than the sum of its proper divisors (3465170).

40742689 is an frugal number, since it uses more digits than its factorization.

40742689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008 (or 504 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The cubic root of 40742689 is about 344.0988566840.

The spelling of 40742689 in words is "forty million, seven hundred forty-two thousand, six hundred eighty-nine".