1288658064 has 40 divisors (see below), whose sum is σ = 3338670240. Its totient is φ = 428309248.

The previous prime is 1288658057. The next prime is 1288658069. The reversal of 1288658064 is 4608568821.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (1288658069) 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, 22029 + ... + 55340.

It is an arithmetic number, because the mean of its divisors is an integer number (83466756).

Almost surely, 2^1288658064 is an apocalyptic number.

It is an amenable number.

1288658064 is an abundant number, since it is smaller than the sum of its proper divisors (2050012176).

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

1288658064 is a wasteful number, since it uses less digits than its factorization.

1288658064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77727 (or 77721 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 48.

The square root of 1288658064 is about 35897.8838373517. The cubic root of 1288658064 is about 1088.2096310671.

The spelling of 1288658064 in words is "one billion, two hundred eighty-eight million, six hundred fifty-eight thousand, sixty-four".