2148128730 has 72 divisors (see below), whose sum is σ = 6139063476. Its totient is φ = 520755840.

The previous prime is 2148128713. The next prime is 2148128753. The reversal of 2148128730 is 378218412.

It can be written as a sum of positive squares in 2 ways, for example, as 1964173761 + 183954969 = 44319^2 + 13563^2 .

It is a super-2 number, since 2×2148128730² = 9228914081302825800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 87739 + ... + 109518.

Almost surely, 2^2148128730 is an apocalyptic number.

2148128730 is an abundant number, since it is smaller than the sum of its proper divisors (3990934746).

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

2148128730 is a wasteful number, since it uses less digits than its factorization.

2148128730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197292 (or 197278 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 2148128730 is about 46347.9096616018. The cubic root of 2148128730 is about 1290.2883256728.

The spelling of 2148128730 in words is "two billion, one hundred forty-eight million, one hundred twenty-eight thousand, seven hundred thirty".