1228038991392 has 48 divisors (see below), whose sum is σ = 3239801409600. Its totient is φ = 407289307392.

The previous prime is 1228038991367. The next prime is 1228038991409. The reversal of 1228038991392 is 2931998308221.

It is a tau number, because it is divible by the number of its divisors (48).

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, 32121783 + ... + 32159990.

It is an arithmetic number, because the mean of its divisors is an integer number (67495862700).

Almost surely, 2^{1228038991392} is an apocalyptic number.

1228038991392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1228038991392 is an abundant number, since it is smaller than the sum of its proper divisors (2011762418208).

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

1228038991392 is a wasteful number, since it uses less digits than its factorization.

1228038991392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64281985 (or 64281977 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 57.

The spelling of 1228038991392 in words is "one trillion, two hundred twenty-eight billion, thirty-eight million, nine hundred ninety-one thousand, three hundred ninety-two".