1269260240 has 80 divisors (see below), whose sum is σ = 3034168896. Its totient is φ = 493516800.

The previous prime is 1269260227. The next prime is 1269260257. The reversal of 1269260240 is 420629621.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1269260240² = 3222043113689715200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1269260197 and 1269260206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 828275 + ... + 829805.

Almost surely, 2^1269260240 is an apocalyptic number.

1269260240 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 1269260240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1517084448).

1269260240 is an abundant number, since it is smaller than the sum of its proper divisors (1764908656).

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

1269260240 is a wasteful number, since it uses less digits than its factorization.

1269260240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828 (or 1822 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 1269260240 is about 35626.6787674630. The cubic root of 1269260240 is about 1082.7218269342.

Adding to 1269260240 its reverse (420629621), we get a palindrome (1689889861).

The spelling of 1269260240 in words is "one billion, two hundred sixty-nine million, two hundred sixty thousand, two hundred forty".