16128540 has 36 divisors (see below), whose sum is σ = 48923784. Its totient is φ = 4300896.

The previous prime is 16128533. The next prime is 16128551. The reversal of 16128540 is 4582161.

16128540 is a `hidden beast` number, since 1 + 612 + 8 + 5 + 40 = 666.

16128540 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44622 + ... + 44981.

It is an arithmetic number, because the mean of its divisors is an integer number (1358994).

Almost surely, 2^16128540 is an apocalyptic number.

16128540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16128540 is an abundant number, since it is smaller than the sum of its proper divisors (32795244).

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

16128540 is a wasteful number, since it uses less digits than its factorization.

16128540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89618 (or 89613 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 16128540 is about 4016.0353584101. The cubic root of 16128540 is about 252.6572036782.

The spelling of 16128540 in words is "sixteen million, one hundred twenty-eight thousand, five hundred forty".