40430657 has 4 divisors (see below), whose sum is σ = 40553136. Its totient is φ = 40308180.

The previous prime is 40430647. The next prime is 40430659. The reversal of 40430657 is 75603404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40430657 - 2¹⁰ = 40429633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40430659) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 60743 + ... + 61404.

It is an arithmetic number, because the mean of its divisors is an integer number (10138284).

Almost surely, 2^40430657 is an apocalyptic number.

It is an amenable number.

40430657 is a deficient number, since it is larger than the sum of its proper divisors (122479).

40430657 is a wasteful number, since it uses less digits than its factorization.

40430657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122478.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 40430657 is about 6358.5105960437. The cubic root of 40430657 is about 343.2181659369.

The spelling of 40430657 in words is "forty million, four hundred thirty thousand, six hundred fifty-seven".