19908072 has 128 divisors (see below), whose sum is σ = 59097600. Its totient is φ = 6200064.

The previous prime is 19908059. The next prime is 19908101. The reversal of 19908072 is 27080991.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 375598 + ... + 375650.

It is an arithmetic number, because the mean of its divisors is an integer number (461700).

Almost surely, 2^19908072 is an apocalyptic number.

19908072 is a gapful number since it is divisible by the number (12) 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 19908072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29548800).

19908072 is an abundant number, since it is smaller than the sum of its proper divisors (39189528).

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

19908072 is a wasteful number, since it uses less digits than its factorization.

19908072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 19908072 is about 4461.8462546350. The cubic root of 19908072 is about 271.0252378651.

The spelling of 19908072 in words is "nineteen million, nine hundred eight thousand, seventy-two".