16120040 has 16 divisors (see below), whose sum is σ = 36270180. Its totient is φ = 6448000.

The previous prime is 16119989. The next prime is 16120051. The reversal of 16120040 is 4002161.

It can be written as a sum of positive squares in 2 ways, for example, as 15665764 + 454276 = 3958^2 + 674^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16119997 and 16120024.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201461 + ... + 201540.

Almost surely, 2^16120040 is an apocalyptic number.

16120040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16120040 is an abundant number, since it is smaller than the sum of its proper divisors (20150140).

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

16120040 is a wasteful number, since it uses less digits than its factorization.

16120040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403012 (or 403008 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 16120040 is about 4014.9769613287. The cubic root of 16120040 is about 252.6128110753.

The spelling of 16120040 in words is "sixteen million, one hundred twenty thousand, forty".