1275730428 has 24 divisors (see below), whose sum is σ = 3401948032. Its totient is φ = 364494384.

The previous prime is 1275730409. The next prime is 1275730429. The reversal of 1275730428 is 8240375721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275730429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7593550 + ... + 7593717.

Almost surely, 2^1275730428 is an apocalyptic number.

It is an amenable number.

1275730428 is an abundant number, since it is smaller than the sum of its proper divisors (2126217604).

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

1275730428 is a wasteful number, since it uses less digits than its factorization.

1275730428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15187281 (or 15187279 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 1275730428 is about 35717.3687160743. The cubic root of 1275730428 is about 1084.5584725478.

The spelling of 1275730428 in words is "one billion, two hundred seventy-five million, seven hundred thirty thousand, four hundred twenty-eight".