1648478364 has 48 divisors (see below), whose sum is σ = 4151938560. Its totient is φ = 506047680.

The previous prime is 1648478347. The next prime is 1648478369. The reversal of 1648478364 is 4638748461.

It is a super-2 number, since 2×1648478364² = 5434961833152232992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1648478369) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56449 + ... + 80519.

It is an arithmetic number, because the mean of its divisors is an integer number (86498720).

Almost surely, 2^1648478364 is an apocalyptic number.

It is an amenable number.

1648478364 is an abundant number, since it is smaller than the sum of its proper divisors (2503460196).

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

1648478364 is a wasteful number, since it uses less digits than its factorization.

1648478364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24530 (or 24528 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 51.

The square root of 1648478364 is about 40601.4576585620. The cubic root of 1648478364 is about 1181.3023932641.

The spelling of 1648478364 in words is "one billion, six hundred forty-eight million, four hundred seventy-eight thousand, three hundred sixty-four".