138470090 has 16 divisors (see below), whose sum is σ = 271905120. Its totient is φ = 50352720.

The previous prime is 138470089. The next prime is 138470107. The reversal of 138470090 is 90074831.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 629300 + ... + 629519.

It is an arithmetic number, because the mean of its divisors is an integer number (16994070).

Almost surely, 2^138470090 is an apocalyptic number.

138470090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138470090 is a deficient number, since it is larger than the sum of its proper divisors (133435030).

138470090 is a wasteful number, since it uses less digits than its factorization.

138470090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258837.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 138470090 is about 11767.3314731931. The cubic root of 138470090 is about 517.3510380531.

The spelling of 138470090 in words is "one hundred thirty-eight million, four hundred seventy thousand, ninety".