28401356 has 48 divisors (see below), whose sum is σ = 55121472. Its totient is φ = 12748800.

The previous prime is 28401341. The next prime is 28401379. The reversal of 28401356 is 65310482.

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, 169985 + ... + 170151.

It is an arithmetic number, because the mean of its divisors is an integer number (1148364).

Almost surely, 2^28401356 is an apocalyptic number.

It is an amenable number.

28401356 is a deficient number, since it is larger than the sum of its proper divisors (26720116).

28401356 is a wasteful number, since it uses less digits than its factorization.

28401356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 288 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 28401356 is about 5329.2922607040. The cubic root of 28401356 is about 305.1029160888.

The spelling of 28401356 in words is "twenty-eight million, four hundred one thousand, three hundred fifty-six".