1264550980 has 96 divisors (see below), whose sum is σ = 3381460992. Its totient is φ = 385737600.

The previous prime is 1264550951. The next prime is 1264550993. The reversal of 1264550980 is 890554621.

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, 63645 + ... + 81115.

It is an arithmetic number, because the mean of its divisors is an integer number (35223552).

Almost surely, 2^1264550980 is an apocalyptic number.

1264550980 is a gapful number since it is divisible by the number (10) 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 1264550980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1690730496).

1264550980 is an abundant number, since it is smaller than the sum of its proper divisors (2116910012).

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

1264550980 is a wasteful number, since it uses less digits than its factorization.

1264550980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17545 (or 17543 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 1264550980 is about 35560.5255866670. The cubic root of 1264550980 is about 1081.3811148651.

The spelling of 1264550980 in words is "one billion, two hundred sixty-four million, five hundred fifty thousand, nine hundred eighty".