1269273840 has 40 divisors (see below), whose sum is σ = 3934749648. Its totient is φ = 338472960.

The previous prime is 1269273829. The next prime is 1269273851. The reversal of 1269273840 is 483729621.

1269273840 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1269273829) and next prime (1269273851).

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1269273840² = 3222112161816691200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1269273792 and 1269273801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2644081 + ... + 2644560.

Almost surely, 2^1269273840 is an apocalyptic number.

1269273840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1269273840 is an abundant number, since it is smaller than the sum of its proper divisors (2665475808).

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

1269273840 is a wasteful number, since it uses less digits than its factorization.

1269273840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5288657 (or 5288651 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 1269273840 is about 35626.8696351504. The cubic root of 1269273840 is about 1082.7256940067.

The spelling of 1269273840 in words is "one billion, two hundred sixty-nine million, two hundred seventy-three thousand, eight hundred forty".