16447420 has 24 divisors (see below), whose sum is σ = 37680048. Its totient is φ = 5980800.

The previous prime is 16447393. The next prime is 16447427. The reversal of 16447420 is 2474461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16447427) 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, 37161 + ... + 37600.

It is an arithmetic number, because the mean of its divisors is an integer number (1570002).

Almost surely, 2^16447420 is an apocalyptic number.

16447420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16447420 is an abundant number, since it is smaller than the sum of its proper divisors (21232628).

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

16447420 is a wasteful number, since it uses less digits than its factorization.

16447420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74781 (or 74779 counting only the distinct ones).

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

The square root of 16447420 is about 4055.5418873438. The cubic root of 16447420 is about 254.3114578875.

The spelling of 16447420 in words is "sixteen million, four hundred forty-seven thousand, four hundred twenty".