1648438454 has 32 divisors (see below), whose sum is σ = 2812744704. Its totient is φ = 719137440.

The previous prime is 1648438447. The next prime is 1648438457. The reversal of 1648438454 is 4548348461.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1648438399 and 1648438408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1648438457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10877 + ... + 58439.

It is an arithmetic number, because the mean of its divisors is an integer number (87898272).

Almost surely, 2^1648438454 is an apocalyptic number.

1648438454 is a deficient number, since it is larger than the sum of its proper divisors (1164306250).

1648438454 is a wasteful number, since it uses less digits than its factorization.

1648438454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47652.

The product of its digits is 1474560, while the sum is 47.

The square root of 1648438454 is about 40600.9661707699. The cubic root of 1648438454 is about 1181.2928599960.

The spelling of 1648438454 in words is "one billion, six hundred forty-eight million, four hundred thirty-eight thousand, four hundred fifty-four".