69142638 has 32 divisors (see below), whose sum is σ = 146803104. Its totient is φ = 21635072.

The previous prime is 69142613. The next prime is 69142649. The reversal of 69142638 is 83624196.

It is a junction number, because it is equal to n+sod(n) for n = 69142596 and 69142605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56206 + ... + 57422.

It is an arithmetic number, because the mean of its divisors is an integer number (4587597).

Almost surely, 2^69142638 is an apocalyptic number.

69142638 is an abundant number, since it is smaller than the sum of its proper divisors (77660466).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

69142638 is a wasteful number, since it uses less digits than its factorization.

69142638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796.

The product of its digits is 62208, while the sum is 39.

The square root of 69142638 is about 8315.2052289766. The cubic root of 69142638 is about 410.4390260567.

The spelling of 69142638 in words is "sixty-nine million, one hundred forty-two thousand, six hundred thirty-eight".