1229825856 has 56 divisors (see below), whose sum is σ = 3718763200. Its totient is φ = 351378432.

The previous prime is 1229825837. The next prime is 1229825879. The reversal of 1229825856 is 6585289221.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×1229825856² = 3024943272172265472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 456181 + ... + 458868.

Almost surely, 2^1229825856 is an apocalyptic number.

1229825856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1229825856 is an abundant number, since it is smaller than the sum of its proper divisors (2488937344).

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

1229825856 is an equidigital number, since it uses as much as digits as its factorization.

1229825856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915071 (or 915061 counting only the distinct ones).

The product of its digits is 691200, while the sum is 48.

The square root of 1229825856 is about 35068.8730357849. The cubic root of 1229825856 is about 1071.3907022450.

The spelling of 1229825856 in words is "one billion, two hundred twenty-nine million, eight hundred twenty-five thousand, eight hundred fifty-six".