69138890 has 8 divisors (see below), whose sum is σ = 124450020. Its totient is φ = 27655552.

The previous prime is 69138887. The next prime is 69138899. The reversal of 69138890 is 9883196.

It can be written as a sum of positive squares in 2 ways, for example, as 66569281 + 2569609 = 8159^2 + 1603^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×69138890² = 9560372220864200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (69138899) 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, 3456935 + ... + 3456954.

Almost surely, 2^69138890 is an apocalyptic number.

69138890 is a deficient number, since it is larger than the sum of its proper divisors (55311130).

69138890 is a wasteful number, since it uses less digits than its factorization.

69138890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6913896.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 69138890 is about 8314.9798556581. The cubic root of 69138890 is about 410.4316097296.

The spelling of 69138890 in words is "sixty-nine million, one hundred thirty-eight thousand, eight hundred ninety".