138464650 has 24 divisors (see below), whose sum is σ = 258644160. Its totient is φ = 55149360.

The previous prime is 138464639. The next prime is 138464659. The reversal of 138464650 is 56464831.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (138464659) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6157 + ... + 17743.

It is an arithmetic number, because the mean of its divisors is an integer number (10776840).

Almost surely, 2^138464650 is an apocalyptic number.

138464650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138464650 is a deficient number, since it is larger than the sum of its proper divisors (120179510).

138464650 is a wasteful number, since it uses less digits than its factorization.

138464650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11838 (or 11833 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 138464650 is about 11767.1003225094. The cubic root of 138464650 is about 517.3442630004.

It can be divided in two parts, 13846 and 4650, that added together give a square (18496 = 136²).

The spelling of 138464650 in words is "one hundred thirty-eight million, four hundred sixty-four thousand, six hundred fifty".