1228399734200 has 96 divisors (see below), whose sum is σ = 2860795022400. Its totient is φ = 490540892160.

The previous prime is 1228399734173. The next prime is 1228399734223. The reversal of 1228399734200 is 24379938221.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 581352344 + ... + 581354456.

It is an arithmetic number, because the mean of its divisors is an integer number (29799948150).

Almost surely, 2^{1228399734200} is an apocalyptic number.

1228399734200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1228399734200 is an abundant number, since it is smaller than the sum of its proper divisors (1632395288200).

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

1228399734200 is a wasteful number, since it uses less digits than its factorization.

1228399734200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5601 (or 5592 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 50.

The spelling of 1228399734200 in words is "one trillion, two hundred twenty-eight billion, three hundred ninety-nine million, seven hundred thirty-four thousand, two hundred".