16171992 has 24 divisors (see below), whose sum is σ = 43799340. Its totient is φ = 5390640.

The previous prime is 16171973. The next prime is 16172017. The reversal of 16171992 is 29917161.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 112234 + ... + 112377.

Almost surely, 2^16171992 is an apocalyptic number.

16171992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16171992 is an abundant number, since it is smaller than the sum of its proper divisors (27627348).

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

16171992 is a wasteful number, since it uses less digits than its factorization.

16171992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224623 (or 224616 counting only the distinct ones).

The product of its digits is 6804, while the sum is 36.

The square root of 16171992 is about 4021.4415325851. The cubic root of 16171992 is about 252.8838953378.

The spelling of 16171992 in words is "sixteen million, one hundred seventy-one thousand, nine hundred ninety-two".