1297400832 has 594 divisors, whose sum is σ = 4996428138. Its totient is φ = 322043904.

The previous prime is 1297400803. The next prime is 1297400851. The reversal of 1297400832 is 2380047921.

It can be written as a sum of positive squares in 3 ways, for example, as 28901376 + 1268499456 = 5376^2 + 35616^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 76317688 + ... + 76317704.

Almost surely, 2^1297400832 is an apocalyptic number.

1297400832 is a gapful number since it is divisible by the number (12) 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 1297400832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2498214069).

1297400832 is an abundant number, since it is smaller than the sum of its proper divisors (3699027306).

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

1297400832 is a wasteful number, since it uses less digits than its factorization.

1297400832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83 (or 42 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 1297400832 is about 36019.4507453959. The cubic root of 1297400832 is about 1090.6650353439.

The spelling of 1297400832 in words is "one billion, two hundred ninety-seven million, four hundred thousand, eight hundred thirty-two".