1287406224 has 120 divisors (see below), whose sum is σ = 4023964672. Its totient is φ = 396109440.

The previous prime is 1287406201. The next prime is 1287406259. The reversal of 1287406224 is 4226047821.

1287406224 is a `hidden beast` number, since 1 + 28 + 7 + 4 + 0 + 622 + 4 = 666.

It is a super-3 number, since 3×1287406224³ (a number of 28 digits) contains 333 as substring.

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 23 ways as a sum of consecutive naturals, for example, 37809 + ... + 63279.

Almost surely, 2^1287406224 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 1287406224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2011982336).

1287406224 is an abundant number, since it is smaller than the sum of its proper divisors (2736558448).

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

1287406224 is a wasteful number, since it uses less digits than its factorization.

1287406224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25507 (or 25489 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 1287406224 is about 35880.4434755202. The cubic root of 1287406224 is about 1087.8571440536.

The spelling of 1287406224 in words is "one billion, two hundred eighty-seven million, four hundred six thousand, two hundred twenty-four".