15428020 has 12 divisors (see below), whose sum is σ = 32398884. Its totient is φ = 6171200.

The previous prime is 15428011. The next prime is 15428047. The reversal of 15428020 is 2082451.

It can be written as a sum of positive squares in 2 ways, for example, as 11209104 + 4218916 = 3348^2 + 2054^2 .

It is a super-2 number, since 2×15428020² = 476047602240800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15427982 and 15428000.

It is a congruent number.

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, 385681 + ... + 385720.

It is an arithmetic number, because the mean of its divisors is an integer number (2699907).

Almost surely, 2^15428020 is an apocalyptic number.

15428020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15428020 is an abundant number, since it is smaller than the sum of its proper divisors (16970864).

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

15428020 is a wasteful number, since it uses less digits than its factorization.

15428020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771410 (or 771408 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 15428020 is about 3927.8518301993. The cubic root of 15428020 is about 248.9449941130.

The spelling of 15428020 in words is "fifteen million, four hundred twenty-eight thousand, twenty".