69381940 has 12 divisors (see below), whose sum is σ = 145702116. Its totient is φ = 27752768.

The previous prime is 69381931. The next prime is 69381943. The reversal of 69381940 is 4918396.

It can be written as a sum of positive squares in 2 ways, for example, as 53173264 + 16208676 = 7292^2 + 4026^2 .

It is a junction number, because it is equal to n+sod(n) for n = 69381893 and 69381902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69381943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1734529 + ... + 1734568.

It is an arithmetic number, because the mean of its divisors is an integer number (12141843).

Almost surely, 2^69381940 is an apocalyptic number.

It is an amenable number.

69381940 is an abundant number, since it is smaller than the sum of its proper divisors (76320176).

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

69381940 is a wasteful number, since it uses less digits than its factorization.

69381940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3469106 (or 3469104 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 69381940 is about 8329.5822224167. The cubic root of 69381940 is about 410.9119893323.

The spelling of 69381940 in words is "sixty-nine million, three hundred eighty-one thousand, nine hundred forty".