1269979040 has 192 divisors, whose sum is σ = 3455343360. Its totient is φ = 436592640.

The previous prime is 1269979027. The next prime is 1269979091. The reversal of 1269979040 is 409799621.

It is a super-2 number, since 2×1269979040² = 3225693524078643200, which contains 22 as substring.

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, 5545646 + ... + 5545874.

It is an arithmetic number, because the mean of its divisors is an integer number (17996580).

Almost surely, 2^1269979040 is an apocalyptic number.

1269979040 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 1269979040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1727671680).

1269979040 is an abundant number, since it is smaller than the sum of its proper divisors (2185364320).

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

1269979040 is a wasteful number, since it uses less digits than its factorization.

1269979040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 1269979040 is about 35636.7652853061. The cubic root of 1269979040 is about 1082.9261752513.

The spelling of 1269979040 in words is "one billion, two hundred sixty-nine million, nine hundred seventy-nine thousand, forty".