1406555280 has 400 divisors, whose sum is σ = 5369031360. Its totient is φ = 339158016.

The previous prime is 1406555279. The next prime is 1406555341. The reversal of 1406555280 is 825556041.

1406555280 is a `hidden beast` number, since 1 + 40 + 65 + 552 + 8 + 0 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4970019 + ... + 4970301.

Almost surely, 2^1406555280 is an apocalyptic number.

1406555280 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 1406555280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2684515680).

1406555280 is an abundant number, since it is smaller than the sum of its proper divisors (3962476080).

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

1406555280 is a wasteful number, since it uses less digits than its factorization.

1406555280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The square root of 1406555280 is about 37504.0701791152. The cubic root of 1406555280 is about 1120.4322523729.

The spelling of 1406555280 in words is "one billion, four hundred six million, five hundred fifty-five thousand, two hundred eighty".