16451004 has 48 divisors (see below), whose sum is σ = 40713120. Its totient is φ = 5160960.

The previous prime is 16450991. The next prime is 16451011. The reversal of 16451004 is 40015461.

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, 13692 + ... + 14844.

It is an arithmetic number, because the mean of its divisors is an integer number (848190).

Almost surely, 2^16451004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16451004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20356560).

16451004 is an abundant number, since it is smaller than the sum of its proper divisors (24262116).

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

16451004 is a wasteful number, since it uses less digits than its factorization.

16451004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230 (or 1228 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 16451004 is about 4055.9837277780. The cubic root of 16451004 is about 254.3299285872.

Adding to 16451004 its reverse (40015461), we get a palindrome (56466465).

The spelling of 16451004 in words is "sixteen million, four hundred fifty-one thousand, four".