165388038 has 32 divisors (see below), whose sum is σ = 343956480. Its totient is φ = 52958880.

The previous prime is 165388021. The next prime is 165388051. The reversal of 165388038 is 830883561.

It is a super-2 number, since 2×165388038² = 54706406226978888, which contains 22 as substring.

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, 22656 + ... + 29052.

It is an arithmetic number, because the mean of its divisors is an integer number (10748640).

Almost surely, 2^165388038 is an apocalyptic number.

165388038 is an abundant number, since it is smaller than the sum of its proper divisors (178568442).

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

165388038 is a wasteful number, since it uses less digits than its factorization.

165388038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6572.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 165388038 is about 12860.3280673550. The cubic root of 165388038 is about 548.9102809249.

The spelling of 165388038 in words is "one hundred sixty-five million, three hundred eighty-eight thousand, thirty-eight".