20028492 has 96 divisors (see below), whose sum is σ = 59189760. Its totient is φ = 5797440.

The previous prime is 20028467. The next prime is 20028509. The reversal of 20028492 is 29482002.

It is a super-2 number, since 2×20028492² = 802280983588128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26958 + ... + 27690.

It is an arithmetic number, because the mean of its divisors is an integer number (616560).

Almost surely, 2^20028492 is an apocalyptic number.

20028492 is a gapful number since it is divisible by the number (22) 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 20028492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29594880).

20028492 is an abundant number, since it is smaller than the sum of its proper divisors (39161268).

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

20028492 is a wasteful number, since it uses less digits than its factorization.

20028492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780 (or 772 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 20028492 is about 4475.3203237310. The cubic root of 20028492 is about 271.5705991428.

The spelling of 20028492 in words is "twenty million, twenty-eight thousand, four hundred ninety-two".