138353470 has 8 divisors (see below), whose sum is σ = 249036264. Its totient is φ = 55341384.

The previous prime is 138353443. The next prime is 138353473. The reversal of 138353470 is 74353831.

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

It is a super-2 number, since 2×138353470² = 38283365322081800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138353473) 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, 6917664 + ... + 6917683.

It is an arithmetic number, because the mean of its divisors is an integer number (31129533).

Almost surely, 2^138353470 is an apocalyptic number.

138353470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138353470 is a deficient number, since it is larger than the sum of its proper divisors (110682794).

138353470 is a wasteful number, since it uses less digits than its factorization.

138353470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13835354.

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 138353470 is about 11762.3751853102. The cubic root of 138353470 is about 517.2057589687.

The spelling of 138353470 in words is "one hundred thirty-eight million, three hundred fifty-three thousand, four hundred seventy".