138810770 has 32 divisors (see below), whose sum is σ = 300585600. Its totient is φ = 45086976.

The previous prime is 138810769. The next prime is 138810799. The reversal of 138810770 is 77018831.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 138810770.

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, 50855 + ... + 53514.

It is an arithmetic number, because the mean of its divisors is an integer number (9393300).

Almost surely, 2^138810770 is an apocalyptic number.

138810770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138810770 is an abundant number, since it is smaller than the sum of its proper divisors (161774830).

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

138810770 is a wasteful number, since it uses less digits than its factorization.

138810770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104402.

The product of its (nonzero) digits is 9408, while the sum is 35.

The square root of 138810770 is about 11781.7982498428. The cubic root of 138810770 is about 517.7749726960.

The spelling of 138810770 in words is "one hundred thirty-eight million, eight hundred ten thousand, seven hundred seventy".