69157940 has 12 divisors (see below), whose sum is σ = 145231716. Its totient is φ = 27663168.

The previous prime is 69157919. The next prime is 69157981. The reversal of 69157940 is 4975196.

It can be written as a sum of positive squares in 2 ways, for example, as 23406244 + 45751696 = 4838^2 + 6764^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1728929 + ... + 1728968.

It is an arithmetic number, because the mean of its divisors is an integer number (12102643).

Almost surely, 2^69157940 is an apocalyptic number.

It is an amenable number.

69157940 is an abundant number, since it is smaller than the sum of its proper divisors (76073776).

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

69157940 is a wasteful number, since it uses less digits than its factorization.

69157940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3457906 (or 3457904 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 69157940 is about 8316.1252996813. The cubic root of 69157940 is about 410.4693019950.

The spelling of 69157940 in words is "sixty-nine million, one hundred fifty-seven thousand, nine hundred forty".