16440742 has 8 divisors (see below), whose sum is σ = 24753600. Its totient is φ = 8189544.

The previous prime is 16440731. The next prime is 16440761. The reversal of 16440742 is 24704461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-5 number, since 5×16440742⁵ (a number of 37 digits) contains 55555 as substring. Note that it is a super-d number also for d = 3.

It is a self number, because there is not a number n which added to its sum of digits gives 16440742.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14742 + ... + 15817.

It is an arithmetic number, because the mean of its divisors is an integer number (3094200).

Almost surely, 2^16440742 is an apocalyptic number.

16440742 is a deficient number, since it is larger than the sum of its proper divisors (8312858).

16440742 is a wasteful number, since it uses less digits than its factorization.

16440742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30830.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 16440742 is about 4054.7184859124. The cubic root of 16440742 is about 254.2770346200.

The spelling of 16440742 in words is "sixteen million, four hundred forty thousand, seven hundred forty-two".