1253704428 has 36 divisors (see below), whose sum is σ = 3176871880. Its totient is φ = 416874816.

The previous prime is 1253704421. The next prime is 1253704471. The reversal of 1253704428 is 8244073521.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1253704392 and 1253704401.

It is not an unprimeable number, because it can be changed into a prime (1253704421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27850 + ... + 57297.

Almost surely, 2^1253704428 is an apocalyptic number.

1253704428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1253704428 is an abundant number, since it is smaller than the sum of its proper divisors (1923167452).

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

1253704428 is a wasteful number, since it uses less digits than its factorization.

1253704428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85566 (or 85561 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 1253704428 is about 35407.6888260163. The cubic root of 1253704428 is about 1078.2804219740.

Adding to 1253704428 its reverse (8244073521), we get a palindrome (9497777949).

The spelling of 1253704428 in words is "one billion, two hundred fifty-three million, seven hundred four thousand, four hundred twenty-eight".