16275987 has 72 divisors (see below), whose sum is σ = 31370976. Its totient is φ = 8031744.

The previous prime is 16275979. The next prime is 16275991. The reversal of 16275987 is 78957261.

16275987 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 not a de Polignac number, because 16275987 - 2³ = 16275979 is a prime.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (16275937) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 97378 + ... + 97544.

It is an arithmetic number, because the mean of its divisors is an integer number (435708).

Almost surely, 2^16275987 is an apocalyptic number.

16275987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

16275987 is a deficient number, since it is larger than the sum of its proper divisors (15094989).

16275987 is a wasteful number, since it uses less digits than its factorization.

16275987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 207 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 16275987 is about 4034.3508771548. The cubic root of 16275987 is about 253.4247994206.

The spelling of 16275987 in words is "sixteen million, two hundred seventy-five thousand, nine hundred eighty-seven".