64988028 has 192 divisors, whose sum is σ = 206438400. Its totient is φ = 17288640.

The previous prime is 64988023. The next prime is 64988029. The reversal of 64988028 is 82088946.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64988023) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1101463 + ... + 1101521.

It is an arithmetic number, because the mean of its divisors is an integer number (1075200).

Almost surely, 2^64988028 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64988028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103219200).

64988028 is an abundant number, since it is smaller than the sum of its proper divisors (141450372).

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

64988028 is a wasteful number, since it uses less digits than its factorization.

64988028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 64988028 is about 8061.5152421862. The cubic root of 64988028 is about 402.0478891490.

The spelling of 64988028 in words is "sixty-four million, nine hundred eighty-eight thousand, twenty-eight".