138687862 has 8 divisors (see below), whose sum is σ = 214742592. Its totient is φ = 67107000.

The previous prime is 138687851. The next prime is 138687869. The reversal of 138687862 is 268786831.

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

It is a super-2 number, since 2×138687862² = 38468646132262088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138687869) 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, 1118389 + ... + 1118512.

It is an arithmetic number, because the mean of its divisors is an integer number (26842824).

Almost surely, 2^138687862 is an apocalyptic number.

138687862 is a deficient number, since it is larger than the sum of its proper divisors (76054730).

138687862 is a wasteful number, since it uses less digits than its factorization.

138687862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2236934.

The product of its digits is 774144, while the sum is 49.

The square root of 138687862 is about 11776.5810828101. The cubic root of 138687862 is about 517.6221087690.

The spelling of 138687862 in words is "one hundred thirty-eight million, six hundred eighty-seven thousand, eight hundred sixty-two".