280495472400 has 1920 divisors, whose sum is σ = 1260585984000. Its totient is φ = 58711910400.

The previous prime is 280495472377. The next prime is 280495472417. The reversal of 280495472400 is 4274594082.

280495472400 is a `hidden beast` number, since 2 + 80 + 4 + 9 + 547 + 24 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 3550575561 + ... + 3550575639.

It is an arithmetic number, because the mean of its divisors is an integer number (656555200).

Almost surely, 2^280495472400 is an apocalyptic number.

280495472400 is a gapful number since it is divisible by the number (20) 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 280495472400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (630292992000).

280495472400 is an abundant number, since it is smaller than the sum of its proper divisors (980090511600).

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

280495472400 is a wasteful number, since it uses less digits than its factorization.

280495472400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 280495472400 in words is "two hundred eighty billion, four hundred ninety-five million, four hundred seventy-two thousand, four hundred".