16071640 has 64 divisors (see below), whose sum is σ = 40239360. Its totient is φ = 5736960.

The previous prime is 16071623. The next prime is 16071677. The reversal of 16071640 is 4617061.

It is a happy number.

It is a super-2 number, since 2×16071640² = 516595224579200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15622 + ... + 16618.

It is an arithmetic number, because the mean of its divisors is an integer number (628740).

Almost surely, 2^16071640 is an apocalyptic number.

16071640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16071640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20119680).

16071640 is an abundant number, since it is smaller than the sum of its proper divisors (24167720).

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

16071640 is a wasteful number, since it uses less digits than its factorization.

16071640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052 (or 1048 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 16071640 is about 4008.9449983755. The cubic root of 16071640 is about 252.3597364955.

Subtracting from 16071640 its sum of digits (25), we obtain a triangular number (16071615 = T₅₆₆₉).

The spelling of 16071640 in words is "sixteen million, seventy-one thousand, six hundred forty".