20740328 has 48 divisors (see below), whose sum is σ = 45660420. Its totient is φ = 8805888.

The previous prime is 20740297. The next prime is 20740351. The reversal of 20740328 is 82304702.

It can be written as a sum of positive squares in 2 ways, for example, as 19695844 + 1044484 = 4438^2 + 1022^2 .

It is a super-2 number, since 2×20740328² = 860322411095168, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20740297 and 20740306.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 61376 + ... + 61712.

Almost surely, 2^20740328 is an apocalyptic number.

20740328 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20740328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22830210).

20740328 is an abundant number, since it is smaller than the sum of its proper divisors (24920092).

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

20740328 is a wasteful number, since it uses less digits than its factorization.

20740328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514 (or 503 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 20740328 is about 4554.1550259077. The cubic root of 20740328 is about 274.7505307845.

The spelling of 20740328 in words is "twenty million, seven hundred forty thousand, three hundred twenty-eight".