1272408480 has 288 divisors, whose sum is σ = 5181382080. Its totient is φ = 290787840.

The previous prime is 1272408479. The next prime is 1272408491. The reversal of 1272408480 is 848042721.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 208675 + ... + 214685.

It is an arithmetic number, because the mean of its divisors is an integer number (17990910).

Almost surely, 2^1272408480 is an apocalyptic number.

1272408480 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 1272408480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2590691040).

1272408480 is an abundant number, since it is smaller than the sum of its proper divisors (3908973600).

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

1272408480 is a wasteful number, since it uses less digits than its factorization.

1272408480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6049 (or 6028 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 1272408480 is about 35670.8351458163. The cubic root of 1272408480 is about 1083.6162728161.

The spelling of 1272408480 in words is "one billion, two hundred seventy-two million, four hundred eight thousand, four hundred eighty".