20190628 has 12 divisors (see below), whose sum is σ = 37412172. Its totient is φ = 9501440.

The previous prime is 20190613. The next prime is 20190631. The reversal of 20190628 is 82609102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17239104 + 2951524 = 4152^2 + 1718^2 .

It is a super-2 number, since 2×20190628² = 815322918068768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20190596 and 20190605.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148393 + ... + 148528.

It is an arithmetic number, because the mean of its divisors is an integer number (3117681).

Almost surely, 2^20190628 is an apocalyptic number.

It is an amenable number.

20190628 is a deficient number, since it is larger than the sum of its proper divisors (17221544).

20190628 is a wasteful number, since it uses less digits than its factorization.

20190628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296942 (or 296940 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 20190628 is about 4493.3982685713. The cubic root of 20190628 is about 272.3014427648.

The spelling of 20190628 in words is "twenty million, one hundred ninety thousand, six hundred twenty-eight".