1290616984 has 24 divisors (see below), whose sum is σ = 2454546780. Its totient is φ = 636199760.

The previous prime is 1290616981. The next prime is 1290616993. The reversal of 1290616984 is 4896160921.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1290616981) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 24327 + ... + 56329.

Almost surely, 2^1290616984 is an apocalyptic number.

It is an amenable number.

1290616984 is a deficient number, since it is larger than the sum of its proper divisors (1163929796).

1290616984 is an equidigital number, since it uses as much as digits as its factorization.

1290616984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32151 (or 32076 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 1290616984 is about 35925.1580929020. The cubic root of 1290616984 is about 1088.7607564132.

It can be divided in two parts, 12906 and 16984, that added together give a triangular number (29890 = T₂₄₄).

The spelling of 1290616984 in words is "one billion, two hundred ninety million, six hundred sixteen thousand, nine hundred eighty-four".