16425890 has 32 divisors (see below), whose sum is σ = 32946480. Its totient is φ = 5854464.

The previous prime is 16425881. The next prime is 16425907. The reversal of 16425890 is 9852461.

It can be written as a sum of positive squares in 8 ways, for example, as 10220809 + 6205081 = 3197^2 + 2491^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16425890.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1592 + ... + 5948.

Almost surely, 2^16425890 is an apocalyptic number.

16425890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16425890 is an abundant number, since it is smaller than the sum of its proper divisors (16520590).

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

16425890 is a wasteful number, since it uses less digits than its factorization.

16425890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4406.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 16425890 is about 4052.8866256040. The cubic root of 16425890 is about 254.2004431806.

The spelling of 16425890 in words is "sixteen million, four hundred twenty-five thousand, eight hundred ninety".