1191920023400 has 24 divisors (see below), whose sum is σ = 2771214054870. Its totient is φ = 476768009280.

The previous prime is 1191920023391. The next prime is 1191920023429. The reversal of 1191920023400 is 43200291911.

It can be written as a sum of positive squares in 3 ways, for example, as 962074569316 + 229845454084 = 980854^2 + 479422^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2979799859 + ... + 2979800258.

Almost surely, 2^{1191920023400} is an apocalyptic number.

1191920023400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1191920023400 is an abundant number, since it is smaller than the sum of its proper divisors (1579294031470).

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

1191920023400 is a wasteful number, since it uses less digits than its factorization.

1191920023400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5959600133 (or 5959600124 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The spelling of 1191920023400 in words is "one trillion, one hundred ninety-one billion, nine hundred twenty million, twenty-three thousand, four hundred".