1321788104 has 64 divisors (see below), whose sum is σ = 3182941440. Its totient is φ = 500163840.

The previous prime is 1321788101. The next prime is 1321788107. The reversal of 1321788104 is 4018871231.

It is an interprime number because it is at equal distance from previous prime (1321788101) and next prime (1321788107).

It is not an unprimeable number, because it can be changed into a prime (1321788101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22727 + ... + 56214.

It is an arithmetic number, because the mean of its divisors is an integer number (49733460).

Almost surely, 2^1321788104 is an apocalyptic number.

1321788104 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1321788104 is an abundant number, since it is smaller than the sum of its proper divisors (1861153336).

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

1321788104 is a wasteful number, since it uses less digits than its factorization.

1321788104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78990 (or 78986 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 1321788104 is about 36356.4038925744. The cubic root of 1321788104 is about 1097.4564104570.

The spelling of 1321788104 in words is "one billion, three hundred twenty-one million, seven hundred eighty-eight thousand, one hundred four".