16149220 has 24 divisors (see below), whose sum is σ = 35388864. Its totient is φ = 6178656.

The previous prime is 16149179. The next prime is 16149223. The reversal of 16149220 is 2294161.

It is not an unprimeable number, because it can be changed into a prime (16149223) 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, 17094 + ... + 18013.

It is an arithmetic number, because the mean of its divisors is an integer number (1474536).

Almost surely, 2^16149220 is an apocalyptic number.

16149220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16149220 is an abundant number, since it is smaller than the sum of its proper divisors (19239644).

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

16149220 is a wasteful number, since it uses less digits than its factorization.

16149220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35139 (or 35137 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 16149220 is about 4018.6092121529. The cubic root of 16149220 is about 252.7651431738.

The spelling of 16149220 in words is "sixteen million, one hundred forty-nine thousand, two hundred twenty".