28057378 has 16 divisors (see below), whose sum is σ = 46500480. Its totient is φ = 12629056.

The previous prime is 28057373. The next prime is 28057397. The reversal of 28057378 is 87375082.

It is a self number, because there is not a number n which added to its sum of digits gives 28057378.

It is not an unprimeable number, because it can be changed into a prime (28057373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17158 + ... + 18721.

It is an arithmetic number, because the mean of its divisors is an integer number (2906280).

Almost surely, 2^28057378 is an apocalyptic number.

28057378 is a deficient number, since it is larger than the sum of its proper divisors (18443102).

28057378 is a wasteful number, since it uses less digits than its factorization.

28057378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35921.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 28057378 is about 5296.9215587924. The cubic root of 28057378 is about 303.8661763822.

The spelling of 28057378 in words is "twenty-eight million, fifty-seven thousand, three hundred seventy-eight".