1230857984 has 72 divisors (see below), whose sum is σ = 2539874400. Its totient is φ = 594874368.

The previous prime is 1230857963. The next prime is 1230857993. The reversal of 1230857984 is 4897580321.

It is a happy number.

It is a super-2 number, since 2×1230857984² = 3030022753553088512, which contains 22 as substring.

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, 1884602 + ... + 1885254.

Almost surely, 2^1230857984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1230857984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1269937200).

1230857984 is an abundant number, since it is smaller than the sum of its proper divisors (1309016416).

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

1230857984 is an equidigital number, since it uses as much as digits as its factorization.

1230857984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905 (or 891 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 1230857984 is about 35083.5856776356. The cubic root of 1230857984 is about 1071.6903390138.

The spelling of 1230857984 in words is "one billion, two hundred thirty million, eight hundred fifty-seven thousand, nine hundred eighty-four".