16442240 has 64 divisors (see below), whose sum is σ = 41052960. Its totient is φ = 6285312.

The previous prime is 16442197. The next prime is 16442287. The reversal of 16442240 is 4224461.

16442240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-3 number, since 3×16442240³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14162 + ... + 15278.

Almost surely, 2^16442240 is an apocalyptic number.

16442240 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 16442240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20526480).

16442240 is an abundant number, since it is smaller than the sum of its proper divisors (24610720).

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

16442240 is a wasteful number, since it uses less digits than its factorization.

16442240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159 (or 1147 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 16442240 is about 4054.9032047633. The cubic root of 16442240 is about 254.2847572120.

The spelling of 16442240 in words is "sixteen million, four hundred forty-two thousand, two hundred forty".