1280102040 has 192 divisors, whose sum is σ = 5034519360. Its totient is φ = 275374080.

The previous prime is 1280102027. The next prime is 1280102051. The reversal of 1280102040 is 402010821.

It is a super-2 number, since 2×1280102040² = 3277322465624323200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27900 + ... + 57780.

It is an arithmetic number, because the mean of its divisors is an integer number (26221455).

Almost surely, 2^1280102040 is an apocalyptic number.

1280102040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1280102040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2517259680).

1280102040 is an abundant number, since it is smaller than the sum of its proper divisors (3754417320).

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

1280102040 is a wasteful number, since it uses less digits than its factorization.

1280102040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29922 (or 29915 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1280102040 is about 35778.5136639296. The cubic root of 1280102040 is about 1085.7958978686.

Adding to 1280102040 its reverse (402010821), we get a palindrome (1682112861).

The spelling of 1280102040 in words is "one billion, two hundred eighty million, one hundred two thousand, forty".