1297534428 has 36 divisors (see below), whose sum is σ = 3282392568. Its totient is φ = 432180000.

The previous prime is 1297534411. The next prime is 1297534429. The reversal of 1297534428 is 8244357921.

1297534428 is a `hidden beast` number, since 1 + 2 + 97 + 534 + 4 + 28 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297534429) 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, 36303 + ... + 62553.

Almost surely, 2^1297534428 is an apocalyptic number.

1297534428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1297534428 is an abundant number, since it is smaller than the sum of its proper divisors (1984858140).

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

1297534428 is a wasteful number, since it uses less digits than its factorization.

1297534428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27634 (or 27629 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 1297534428 is about 36021.3051956755. The cubic root of 1297534428 is about 1090.7024700574.

The spelling of 1297534428 in words is "one billion, two hundred ninety-seven million, five hundred thirty-four thousand, four hundred twenty-eight".