1280104100380 has 48 divisors (see below), whose sum is σ = 3233947207680. Its totient is φ = 415793210688.

The previous prime is 1280104100339. The next prime is 1280104100441. The reversal of 1280104100380 is 830014010821.

It is a super-2 number, since 2×1280104100380² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240618412 + ... + 240623731.

It is an arithmetic number, because the mean of its divisors is an integer number (67373900160).

Almost surely, 2^{1280104100380} is an apocalyptic number.

1280104100380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1280104100380 is an abundant number, since it is smaller than the sum of its proper divisors (1953843107300).

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

1280104100380 is a wasteful number, since it uses less digits than its factorization.

1280104100380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481242178 (or 481242176 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The spelling of 1280104100380 in words is "one trillion, two hundred eighty billion, one hundred four million, one hundred thousand, three hundred eighty".