16987740 has 96 divisors (see below), whose sum is σ = 59318784. Its totient is φ = 3528960.

The previous prime is 16987739. The next prime is 16987781. The reversal of 16987740 is 4778961.

16987740 = T₄₅₅ + T₄₅₆ + ... + T₅₈₀.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 16987692 and 16987701.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2782 + ... + 6458.

It is an arithmetic number, because the mean of its divisors is an integer number (617904).

Almost surely, 2^16987740 is an apocalyptic number.

16987740 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 16987740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29659392).

16987740 is an abundant number, since it is smaller than the sum of its proper divisors (42331044).

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

16987740 is a wasteful number, since it uses less digits than its factorization.

16987740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3707 (or 3705 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 16987740 is about 4121.6186140884. The cubic root of 16987740 is about 257.0663326081.

The spelling of 16987740 in words is "sixteen million, nine hundred eighty-seven thousand, seven hundred forty".