1648138704 has 20 divisors (see below), whose sum is σ = 4257691776. Its totient is φ = 549379552.

The previous prime is 1648138703. The next prime is 1648138727. The reversal of 1648138704 is 4078318461.

It is a super-2 number, since 2×1648138704² = 5432722375245599232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1648138703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17168064 + ... + 17168159.

Almost surely, 2^1648138704 is an apocalyptic number.

It is an amenable number.

1648138704 is an abundant number, since it is smaller than the sum of its proper divisors (2609553072).

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

1648138704 is a wasteful number, since it uses less digits than its factorization.

1648138704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34336234 (or 34336228 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 1648138704 is about 40597.2745883267. The cubic root of 1648138704 is about 1181.2212540470.

The spelling of 1648138704 in words is "one billion, six hundred forty-eight million, one hundred thirty-eight thousand, seven hundred four".