16138620 has 36 divisors (see below), whose sum is σ = 48954360. Its totient is φ = 4303584.

The previous prime is 16138613. The next prime is 16138667. The reversal of 16138620 is 2683161.

16138620 is a `hidden beast` number, since 1 + 6 + 1 + 38 + 620 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44650 + ... + 45009.

Almost surely, 2^16138620 is an apocalyptic number.

16138620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16138620 is an abundant number, since it is smaller than the sum of its proper divisors (32815740).

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

16138620 is a wasteful number, since it uses less digits than its factorization.

16138620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89674 (or 89669 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 16138620 is about 4017.2901314194. The cubic root of 16138620 is about 252.7098278718.

It can be divided in two parts, 161 and 38620, that added together give a triangular number (38781 = T₂₇₈).

The spelling of 16138620 in words is "sixteen million, one hundred thirty-eight thousand, six hundred twenty".