1478344640 has 28 divisors (see below), whose sum is σ = 3520308936. Its totient is φ = 591337728.

The previous prime is 1478344631. The next prime is 1478344661. The reversal of 1478344640 is 464438741.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2309594 + ... + 2310233.

Almost surely, 2^1478344640 is an apocalyptic number.

1478344640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1478344640 is an abundant number, since it is smaller than the sum of its proper divisors (2041964296).

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

1478344640 is an equidigital number, since it uses as much as digits as its factorization.

1478344640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4619844 (or 4619834 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 41.

The square root of 1478344640 is about 38449.2475869164. The cubic root of 1478344640 is about 1139.1788073899.

The spelling of 1478344640 in words is "one billion, four hundred seventy-eight million, three hundred forty-four thousand, six hundred forty".