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BaseRepresentation
bin10000100010100…
…10101110100101
3100200002021102200
420101102232211
5241010012020
621433525113
73303235350
oct1021225645
9320067380
10138750885
1171359659
123a573799
1322990920
14145db297
15c2ab590
hex8452ba5

138750885 has 96 divisors (see below), whose sum is σ = 305829888. Its totient is φ = 56609280.

The previous prime is 138750869. The next prime is 138750893. The reversal of 138750885 is 588057831.

It is a happy number.

138750885 is a `hidden beast` number, since 138 + 7 + 508 + 8 + 5 = 666.

It is not a de Polignac number, because 138750885 - 24 = 138750869 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 138750885.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 126399 + ... + 127491.

It is an arithmetic number, because the mean of its divisors is an integer number (3185728).

Almost surely, 2138750885 is an apocalyptic number.

138750885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138750885 is an abundant number, since it is smaller than the sum of its proper divisors (167079003).

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

138750885 is a wasteful number, since it uses less digits than its factorization.

138750885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1155 (or 1152 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 45.

The square root of 138750885 is about 11779.2565554877. The cubic root of 138750885 is about 517.7005034161.

The spelling of 138750885 in words is "one hundred thirty-eight million, seven hundred fifty thousand, eight hundred eighty-five".