16081388 has 24 divisors (see below), whose sum is σ = 29992032. Its totient is φ = 7518464.

The previous prime is 16081381. The next prime is 16081409. The reversal of 16081388 is 88318061.

It is a happy number.

It is a super-2 number, since 2×16081388² = 517222080013088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16081381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11081 + ... + 12447.

It is an arithmetic number, because the mean of its divisors is an integer number (1249668).

Almost surely, 2^16081388 is an apocalyptic number.

It is an amenable number.

16081388 is a deficient number, since it is larger than the sum of its proper divisors (13910644).

16081388 is a wasteful number, since it uses less digits than its factorization.

16081388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561 (or 1559 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 16081388 is about 4010.1605952879. The cubic root of 16081388 is about 252.4107477907.

The spelling of 16081388 in words is "sixteen million, eighty-one thousand, three hundred eighty-eight".