40069629 has 24 divisors (see below), whose sum is σ = 61913592. Its totient is φ = 24883200.

The previous prime is 40069621. The next prime is 40069691. The reversal of 40069629 is 92696004.

It can be written as a sum of positive squares in 4 ways, for example, as 24029604 + 16040025 = 4902^2 + 4005^2 .

It is not a de Polignac number, because 40069629 - 2³ = 40069621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40069593 and 40069602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40069621) 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, 14157 + ... + 16749.

It is an arithmetic number, because the mean of its divisors is an integer number (2579733).

Almost surely, 2^40069629 is an apocalyptic number.

It is an amenable number.

40069629 is a deficient number, since it is larger than the sum of its proper divisors (21843963).

40069629 is a wasteful number, since it uses less digits than its factorization.

40069629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2717 (or 2714 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 40069629 is about 6330.0575826765. The cubic root of 40069629 is about 342.1935141621.

The spelling of 40069629 in words is "forty million, sixty-nine thousand, six hundred twenty-nine".