28977838 has 16 divisors (see below), whose sum is σ = 45484416. Its totient is φ = 13819960.

The previous prime is 28977821. The next prime is 28977859. The reversal of 28977838 is 83877982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21945 + ... + 23227.

It is an arithmetic number, because the mean of its divisors is an integer number (2842776).

Almost surely, 2^28977838 is an apocalyptic number.

28977838 is a deficient number, since it is larger than the sum of its proper divisors (16506578).

28977838 is a wasteful number, since it uses less digits than its factorization.

28977838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799.

The product of its digits is 1354752, while the sum is 52.

The square root of 28977838 is about 5383.1067238166. The cubic root of 28977838 is about 307.1533997669.

The spelling of 28977838 in words is "twenty-eight million, nine hundred seventy-seven thousand, eight hundred thirty-eight".