1256032830 has 32 divisors (see below), whose sum is σ = 3246362784. Its totient is φ = 309177216.

The previous prime is 1256032793. The next prime is 1256032837. The reversal of 1256032830 is 382306521.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256032837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1609909 + ... + 1610688.

It is an arithmetic number, because the mean of its divisors is an integer number (101448837).

Almost surely, 2^1256032830 is an apocalyptic number.

1256032830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1256032830 is an abundant number, since it is smaller than the sum of its proper divisors (1990329954).

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

1256032830 is a wasteful number, since it uses less digits than its factorization.

1256032830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220620.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 1256032830 is about 35440.5534663329. The cubic root of 1256032830 is about 1078.9475429608.

The spelling of 1256032830 in words is "one billion, two hundred fifty-six million, thirty-two thousand, eight hundred thirty".