1478242440 has 256 divisors, whose sum is σ = 5170176000. Its totient is φ = 375217920.

The previous prime is 1478242411. The next prime is 1478242477. The reversal of 1478242440 is 442428741.

It is a super-2 number, since 2×1478242440² = 4370401422834307200, which contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 1478242395 and 1478242404.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2242831 + ... + 2243489.

It is an arithmetic number, because the mean of its divisors is an integer number (20196000).

Almost surely, 2^1478242440 is an apocalyptic number.

1478242440 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 1478242440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2585088000).

1478242440 is an abundant number, since it is smaller than the sum of its proper divisors (3691933560).

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

1478242440 is a wasteful number, since it uses less digits than its factorization.

1478242440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 36.

The square root of 1478242440 is about 38447.9185392395. The cubic root of 1478242440 is about 1139.1525557853.

The spelling of 1478242440 in words is "one billion, four hundred seventy-eight million, two hundred forty-two thousand, four hundred forty".