1478888645 has 8 divisors (see below), whose sum is σ = 1911179256. Its totient is φ = 1092102336.

The previous prime is 1478888639. The next prime is 1478888647. The reversal of 1478888645 is 5468888741.

It can be written as a sum of positive squares in 4 ways, for example, as 277988929 + 1200899716 = 16673^2 + 34654^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1478888645 - 2⁴ = 1478888629 is a prime.

It is a super-2 number, since 2×1478888645² = 4374223248619872050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1478888647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11376002 + ... + 11376131.

It is an arithmetic number, because the mean of its divisors is an integer number (238897407).

Almost surely, 2^1478888645 is an apocalyptic number.

It is an amenable number.

1478888645 is a deficient number, since it is larger than the sum of its proper divisors (432290611).

1478888645 is a wasteful number, since it uses less digits than its factorization.

1478888645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22752151.

The product of its digits is 13762560, while the sum is 59.

The square root of 1478888645 is about 38456.3212619200. The cubic root of 1478888645 is about 1139.3185228867.

The spelling of 1478888645 in words is "one billion, four hundred seventy-eight million, eight hundred eighty-eight thousand, six hundred forty-five".