1290723984920 has 32 divisors (see below), whose sum is σ = 2923619778000. Its totient is φ = 512824560768.

The previous prime is 1290723984881. The next prime is 1290723985027. The reversal of 1290723984920 is 294893270921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108276254 + ... + 108288173.

Almost surely, 2^{1290723984920} is an apocalyptic number.

1290723984920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1290723984920 is an abundant number, since it is smaller than the sum of its proper divisors (1632895793080).

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

1290723984920 is a wasteful number, since it uses less digits than its factorization.

1290723984920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216564587 (or 216564583 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 56.

The spelling of 1290723984920 in words is "one trillion, two hundred ninety billion, seven hundred twenty-three million, nine hundred eighty-four thousand, nine hundred twenty".