16115140 has 12 divisors (see below), whose sum is σ = 33841836. Its totient is φ = 6446048.

The previous prime is 16115137. The next prime is 16115147. The reversal of 16115140 is 4151161.

It can be written as a sum of positive squares in 2 ways, for example, as 4946176 + 11168964 = 2224^2 + 3342^2 .

It is not an unprimeable number, because it can be changed into a prime (16115147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402859 + ... + 402898.

It is an arithmetic number, because the mean of its divisors is an integer number (2820153).

Almost surely, 2^16115140 is an apocalyptic number.

16115140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16115140 is an abundant number, since it is smaller than the sum of its proper divisors (17726696).

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

16115140 is a wasteful number, since it uses less digits than its factorization.

16115140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805766 (or 805764 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 16115140 is about 4014.3666997423. The cubic root of 16115140 is about 252.5872129541.

It can be divided in two parts, 16 and 115140, that multiplied together give a triangular number (1842240 = T₁₉₁₉).

The spelling of 16115140 in words is "sixteen million, one hundred fifteen thousand, one hundred forty".