16000440 has 32 divisors (see below), whose sum is σ = 48001680. Its totient is φ = 4266752.

The previous prime is 16000409. The next prime is 16000447. The reversal of 16000440 is 4400061.

16000440 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16000447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66549 + ... + 66788.

Almost surely, 2^16000440 is an apocalyptic number.

16000440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16000440 is an abundant number, since it is smaller than the sum of its proper divisors (32001240).

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

16000440 is a wasteful number, since it uses less digits than its factorization.

16000440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133351 (or 133347 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 16000440 is about 4000.0549996219. The cubic root of 16000440 is about 251.9865198131.

The spelling of 16000440 in words is "sixteen million, four hundred forty", and thus it is an aban number.