42688429 has 16 divisors (see below), whose sum is σ = 49893760. Its totient is φ = 35769600.

The previous prime is 42688423. The next prime is 42688441. The reversal of 42688429 is 92488624.

It is a cyclic number.

It is not a de Polignac number, because 42688429 - 2⁵ = 42688397 is a prime.

It is a super-3 number, since 3×42688429³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42688423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70729 + ... + 71329.

It is an arithmetic number, because the mean of its divisors is an integer number (3118360).

Almost surely, 2^42688429 is an apocalyptic number.

It is an amenable number.

42688429 is a deficient number, since it is larger than the sum of its proper divisors (7205331).

42688429 is a wasteful number, since it uses less digits than its factorization.

42688429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820.

The product of its digits is 221184, while the sum is 43.

The square root of 42688429 is about 6533.6382666934. The cubic root of 42688429 is about 349.4915856381.

The spelling of 42688429 in words is "forty-two million, six hundred eighty-eight thousand, four hundred twenty-nine".