1270489860 has 120 divisors (see below), whose sum is σ = 3995000856. Its totient is φ = 337996800.

The previous prime is 1270489817. The next prime is 1270489877. The reversal of 1270489860 is 689840721.

It can be written as a sum of positive squares in 4 ways, for example, as 46049796 + 1224440064 = 6786^2 + 34992^2 .

It is a super-2 number, since 2×1270489860² = 3228288968725639200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1057260 + ... + 1058460.

Almost surely, 2^1270489860 is an apocalyptic number.

1270489860 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 1270489860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1997500428).

1270489860 is an abundant number, since it is smaller than the sum of its proper divisors (2724510996).

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

1270489860 is a wasteful number, since it uses less digits than its factorization.

1270489860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1875 (or 1864 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 1270489860 is about 35643.9316013259. The cubic root of 1270489860 is about 1083.0713498776.

The spelling of 1270489860 in words is "one billion, two hundred seventy million, four hundred eighty-nine thousand, eight hundred sixty".