280405158404672 has 224 divisors, whose sum is σ = 658295767374336. Its totient is φ = 116012231884800.

The previous prime is 280405158404633. The next prime is 280405158404687. The reversal of 280405158404672 is 276404851504082.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (224).

It is a super-2 number, since 2×280405158404672² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 782426228 + ... + 782784524.

It is an arithmetic number, because the mean of its divisors is an integer number (2938820390064).

Almost surely, 2^{280405158404672} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 280405158404672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329147883687168).

280405158404672 is an abundant number, since it is smaller than the sum of its proper divisors (377890608969664).

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

280405158404672 is a wasteful number, since it uses less digits than its factorization.

280405158404672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358805 (or 358795 counting only the distinct ones).

The product of its (nonzero) digits is 17203200, while the sum is 56.

The spelling of 280405158404672 in words is "two hundred eighty trillion, four hundred five billion, one hundred fifty-eight million, four hundred four thousand, six hundred seventy-two".