64990848 has 128 divisors (see below), whose sum is σ = 190552320. Its totient is φ = 19501056.

The previous prime is 64990843. The next prime is 64990859. The reversal of 64990848 is 84809946.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 64990797 and 64990806.

It is not an unprimeable number, because it can be changed into a prime (64990841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234486 + ... + 234762.

It is an arithmetic number, because the mean of its divisors is an integer number (1488690).

Almost surely, 2^64990848 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 64990848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95276160).

64990848 is an abundant number, since it is smaller than the sum of its proper divisors (125561472).

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

64990848 is a wasteful number, since it uses less digits than its factorization.

64990848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 64990848 is about 8061.6901453727. The cubic root of 64990848 is about 402.0537043669.

The spelling of 64990848 in words is "sixty-four million, nine hundred ninety thousand, eight hundred forty-eight".