138247450 has 24 divisors (see below), whose sum is σ = 280517760. Its totient is φ = 50271600.

The previous prime is 138247441. The next prime is 138247463. The reversal of 138247450 is 54742831.

138247450 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138247450² = 38224714863005000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 125130 + ... + 126229.

It is an arithmetic number, because the mean of its divisors is an integer number (11688240).

Almost surely, 2^138247450 is an apocalyptic number.

138247450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138247450 is an abundant number, since it is smaller than the sum of its proper divisors (142270310).

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

138247450 is a wasteful number, since it uses less digits than its factorization.

138247450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251382 (or 251377 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 138247450 is about 11757.8675787746. The cubic root of 138247450 is about 517.0736139468.

The spelling of 138247450 in words is "one hundred thirty-eight million, two hundred forty-seven thousand, four hundred fifty".