138510477 has 24 divisors (see below), whose sum is σ = 229295040. Its totient is φ = 78926400.

The previous prime is 138510473. The next prime is 138510479. The reversal of 138510477 is 774015831.

138510477 is a `hidden beast` number, since 138 + 51 + 0 + 477 = 666.

It is not a de Polignac number, because 138510477 - 2² = 138510473 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138510473) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20977 + ... + 26777.

It is an arithmetic number, because the mean of its divisors is an integer number (9553960).

Almost surely, 2^138510477 is an apocalyptic number.

It is an amenable number.

138510477 is a deficient number, since it is larger than the sum of its proper divisors (90784563).

138510477 is a wasteful number, since it uses less digits than its factorization.

138510477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6193 (or 6190 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 138510477 is about 11769.0474125989. The cubic root of 138510477 is about 517.4013310450.

The spelling of 138510477 in words is "one hundred thirty-eight million, five hundred ten thousand, four hundred seventy-seven".