19880064 has 48 divisors (see below), whose sum is σ = 57210270. Its totient is φ = 6626304.

The previous prime is 19880059. The next prime is 19880101. The reversal of 19880064 is 46008891.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 19713600 + 166464 = 4440^2 + 408^2 .

It is a tau number, because it is divible by the number of its divisors (48).

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 5 ways as a sum of consecutive naturals, for example, 7477 + ... + 9780.

Almost surely, 2^19880064 is an apocalyptic number.

It is an amenable number.

19880064 is an abundant number, since it is smaller than the sum of its proper divisors (37330206).

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

19880064 is a wasteful number, since it uses less digits than its factorization.

19880064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17277 (or 17262 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 19880064 is about 4458.7065388967. The cubic root of 19880064 is about 270.8980794369.

The spelling of 19880064 in words is "nineteen million, eight hundred eighty thousand, sixty-four".