28536420 has 48 divisors (see below), whose sum is σ = 87167808. Its totient is φ = 6917760.

The previous prime is 28536407. The next prime is 28536437. The reversal of 28536420 is 2463582.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20959 + ... + 22278.

It is an arithmetic number, because the mean of its divisors is an integer number (1815996).

Almost surely, 2^28536420 is an apocalyptic number.

28536420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28536420 is an abundant number, since it is smaller than the sum of its proper divisors (58631388).

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

28536420 is a wasteful number, since it uses less digits than its factorization.

28536420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43260 (or 43258 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 28536420 is about 5341.9490824979. The cubic root of 28536420 is about 305.5857952563.

The spelling of 28536420 in words is "twenty-eight million, five hundred thirty-six thousand, four hundred twenty".