138951670 has 32 divisors (see below), whose sum is σ = 293842080. Its totient is φ = 46640640.

The previous prime is 138951653. The next prime is 138951679. The reversal of 138951670 is 76159831.

138951670 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138951679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47155 + ... + 50014.

It is an arithmetic number, because the mean of its divisors is an integer number (9182565).

Almost surely, 2^138951670 is an apocalyptic number.

138951670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138951670 is an abundant number, since it is smaller than the sum of its proper divisors (154890410).

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

138951670 is a wasteful number, since it uses less digits than its factorization.

138951670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97200.

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 138951670 is about 11787.7762958074. The cubic root of 138951670 is about 517.9501027751.

The spelling of 138951670 in words is "one hundred thirty-eight million, nine hundred fifty-one thousand, six hundred seventy".