40440629 has 2 divisors, whose sum is σ = 40440630. Its totient is φ = 40440628.

The previous prime is 40440611. The next prime is 40440661. The reversal of 40440629 is 92604404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39627025 + 813604 = 6295^2 + 902^2 .

It is a cyclic number.

It is not a de Polignac number, because 40440629 - 2⁸ = 40440373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40440679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20220314 + 20220315.

It is an arithmetic number, because the mean of its divisors is an integer number (20220315).

Almost surely, 2^40440629 is an apocalyptic number.

It is an amenable number.

40440629 is a deficient number, since it is larger than the sum of its proper divisors (1).

40440629 is an equidigital number, since it uses as much as digits as its factorization.

40440629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 40440629 is about 6359.2946935961. The cubic root of 40440629 is about 343.2463812440.

The spelling of 40440629 in words is "forty million, four hundred forty thousand, six hundred twenty-nine".