16525890 has 64 divisors (see below), whose sum is σ = 44593920. Its totient is φ = 4354560.

The previous prime is 16525757. The next prime is 16525897. The reversal of 16525890 is 9852561.

It is a happy number.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (16525897) by changing a digit.

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, 25875 + ... + 26505.

It is an arithmetic number, because the mean of its divisors is an integer number (696780).

Almost surely, 2^16525890 is an apocalyptic number.

16525890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16525890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22296960).

16525890 is an abundant number, since it is smaller than the sum of its proper divisors (28068030).

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

16525890 is a wasteful number, since it uses less digits than its factorization.

16525890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744 (or 738 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 16525890 is about 4065.2047918893. The cubic root of 16525890 is about 254.7152530887.

The spelling of 16525890 in words is "sixteen million, five hundred twenty-five thousand, eight hundred ninety".