40424657 has 24 divisors (see below), whose sum is σ = 53635176. Its totient is φ = 30094848.

The previous prime is 40424633. The next prime is 40424669. The reversal of 40424657 is 75642404.

It can be written as a sum of positive squares in 4 ways, for example, as 5271616 + 35153041 = 2296^2 + 5929^2 .

It is not a de Polignac number, because 40424657 - 2¹⁰ = 40423633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40424627) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8963 + ... + 12695.

It is an arithmetic number, because the mean of its divisors is an integer number (2234799).

Almost surely, 2^40424657 is an apocalyptic number.

It is an amenable number.

40424657 is a deficient number, since it is larger than the sum of its proper divisors (13210519).

40424657 is a wasteful number, since it uses less digits than its factorization.

40424657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3777 (or 3770 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 32.

The square root of 40424657 is about 6358.0387699353. The cubic root of 40424657 is about 343.2011869823.

The spelling of 40424657 in words is "forty million, four hundred twenty-four thousand, six hundred fifty-seven".