138458830 has 8 divisors (see below), whose sum is σ = 249225912. Its totient is φ = 55383528.

The previous prime is 138458767. The next prime is 138458849. The reversal of 138458830 is 38854831.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6922932 + ... + 6922951.

It is an arithmetic number, because the mean of its divisors is an integer number (31153239).

Almost surely, 2^138458830 is an apocalyptic number.

138458830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138458830 is a deficient number, since it is larger than the sum of its proper divisors (110767082).

138458830 is a wasteful number, since it uses less digits than its factorization.

138458830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13845890.

The product of its (nonzero) digits is 92160, while the sum is 40.

The square root of 138458830 is about 11766.8530202429. The cubic root of 138458830 is about 517.3370144937.

The spelling of 138458830 in words is "one hundred thirty-eight million, four hundred fifty-eight thousand, eight hundred thirty".