1273698240 has 224 divisors, whose sum is σ = 4219797504. Its totient is φ = 325140480.

The previous prime is 1273698221. The next prime is 1273698247. The reversal of 1273698240 is 428963721.

It is a junction number, because it is equal to n+sod(n) for n = 1273698192 and 1273698201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1273698247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3779352 + ... + 3779688.

Almost surely, 2^1273698240 is an apocalyptic number.

1273698240 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 1273698240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2109898752).

1273698240 is an abundant number, since it is smaller than the sum of its proper divisors (2946099264).

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

1273698240 is a wasteful number, since it uses less digits than its factorization.

1273698240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515 (or 505 counting only the distinct ones).

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

The square root of 1273698240 is about 35688.9092015993. The cubic root of 1273698240 is about 1083.9822802712.

The spelling of 1273698240 in words is "one billion, two hundred seventy-three million, six hundred ninety-eight thousand, two hundred forty".