138822810 has 32 divisors (see below), whose sum is σ = 380771712. Its totient is φ = 31730880.

The previous prime is 138822809. The next prime is 138822839. The reversal of 138822810 is 18228831.

It is a super-2 number, since 2×138822810² = 38543545152592200, which contains 22 as substring.

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, 330321 + ... + 330740.

It is an arithmetic number, because the mean of its divisors is an integer number (11899116).

Almost surely, 2^138822810 is an apocalyptic number.

138822810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138822810 is an abundant number, since it is smaller than the sum of its proper divisors (241948902).

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

138822810 is a wasteful number, since it uses less digits than its factorization.

138822810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661078.

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 138822810 is about 11782.3091964182. The cubic root of 138822810 is about 517.7899423088.

The spelling of 138822810 in words is "one hundred thirty-eight million, eight hundred twenty-two thousand, eight hundred ten".