16406140 has 24 divisors (see below), whose sum is σ = 34529040. Its totient is φ = 6547968.

The previous prime is 16406129. The next prime is 16406147. The reversal of 16406140 is 4160461.

It is a super-2 number, since 2×16406140² = 538322859399200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16406147) 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, 17196 + ... + 18124.

It is an arithmetic number, because the mean of its divisors is an integer number (1438710).

Almost surely, 2^16406140 is an apocalyptic number.

16406140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16406140 is an abundant number, since it is smaller than the sum of its proper divisors (18122900).

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

16406140 is a wasteful number, since it uses less digits than its factorization.

16406140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1821 (or 1819 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 16406140 is about 4050.4493577874. The cubic root of 16406140 is about 254.0985213111.

The spelling of 16406140 in words is "sixteen million, four hundred six thousand, one hundred forty".