1284452478 has 80 divisors (see below), whose sum is σ = 3079721040. Its totient is φ = 398908800.

The previous prime is 1284452471. The next prime is 1284452501. The reversal of 1284452478 is 8742544821.

1284452478 is a `hidden beast` number, since 12 + 8 + 44 + 524 + 78 = 666.

It is a super-3 number, since 3×1284452478³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284452471) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 184338 + ... + 191178.

It is an arithmetic number, because the mean of its divisors is an integer number (38496513).

Almost surely, 2^1284452478 is an apocalyptic number.

1284452478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1284452478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1539860520).

1284452478 is an abundant number, since it is smaller than the sum of its proper divisors (1795268562).

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

1284452478 is a wasteful number, since it uses less digits than its factorization.

1284452478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6935 (or 6926 counting only the distinct ones).

The product of its digits is 573440, while the sum is 45.

The square root of 1284452478 is about 35839.2588930073. The cubic root of 1284452478 is about 1087.0245360299.

The spelling of 1284452478 in words is "one billion, two hundred eighty-four million, four hundred fifty-two thousand, four hundred seventy-eight".