16123940 has 36 divisors (see below), whose sum is σ = 39390876. Its totient is φ = 5527872.

The previous prime is 16123927. The next prime is 16123957. The reversal of 16123940 is 4932161.

It can be written as a sum of positive squares in 2 ways, for example, as 10916416 + 5207524 = 3304^2 + 2282^2 .

It is a super-2 number, since 2×16123940² = 519962882247200, which contains 22 as substring.

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, 7247 + ... + 9206.

It is an arithmetic number, because the mean of its divisors is an integer number (1094191).

Almost surely, 2^16123940 is an apocalyptic number.

16123940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16123940 is an abundant number, since it is smaller than the sum of its proper divisors (23266936).

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

16123940 is a wasteful number, since it uses less digits than its factorization.

16123940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16476 (or 16467 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 16123940 is about 4015.4626134482. The cubic root of 16123940 is about 252.6331813830.

The spelling of 16123940 in words is "sixteen million, one hundred twenty-three thousand, nine hundred forty".