138700824 has 64 divisors (see below), whose sum is σ = 373235040. Its totient is φ = 42792960.

The previous prime is 138700813. The next prime is 138700831. The reversal of 138700824 is 428007831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22102 + ... + 27674.

Almost surely, 2^138700824 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138700824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186617520).

138700824 is an abundant number, since it is smaller than the sum of its proper divisors (234534216).

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

138700824 is a wasteful number, since it uses less digits than its factorization.

138700824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5660 (or 5656 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 138700824 is about 11777.1313994538. The cubic root of 138700824 is about 517.6382342099.

The spelling of 138700824 in words is "one hundred thirty-eight million, seven hundred thousand, eight hundred twenty-four".