1648157820 has 48 divisors (see below), whose sum is σ = 4886306208. Its totient is φ = 413655040.

The previous prime is 1648157741. The next prime is 1648157821. The reversal of 1648157820 is 287518461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1648157821) 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, 806901 + ... + 808940.

It is an arithmetic number, because the mean of its divisors is an integer number (101798046).

Almost surely, 2^1648157820 is an apocalyptic number.

1648157820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1648157820 is an abundant number, since it is smaller than the sum of its proper divisors (3238148388).

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

1648157820 is a wasteful number, since it uses less digits than its factorization.

1648157820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1615870 (or 1615868 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 42.

The square root of 1648157820 is about 40597.5100221676. The cubic root of 1648157820 is about 1181.2258208427.

The spelling of 1648157820 in words is "one billion, six hundred forty-eight million, one hundred fifty-seven thousand, eight hundred twenty".