138750650 has 24 divisors (see below), whose sum is σ = 258582780. Its totient is φ = 55391360.

The previous prime is 138750649. The next prime is 138750659. The reversal of 138750650 is 56057831.

It can be written as a sum of positive squares in 6 ways, for example, as 15784729 + 122965921 = 3973^2 + 11089^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 138750650.

It is not an unprimeable number, because it can be changed into a prime (138750659) 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, 26012 + ... + 30888.

Almost surely, 2^138750650 is an apocalyptic number.

138750650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138750650 is a deficient number, since it is larger than the sum of its proper divisors (119832130).

138750650 is a wasteful number, since it uses less digits than its factorization.

138750650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5458 (or 5453 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 138750650 is about 11779.2465803208. The cubic root of 138750650 is about 517.7002111424.

The spelling of 138750650 in words is "one hundred thirty-eight million, seven hundred fifty thousand, six hundred fifty".