28679990 has 16 divisors (see below), whose sum is σ = 52157952. Its totient is φ = 11353344.

The previous prime is 28679957. The next prime is 28679999. The reversal of 28679990 is 9997682.

28679990 = T₁₉₄₈ + T₁₉₄₉ + ... + T₁₉₆₂.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28679999) 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, 13814 + ... + 15753.

It is an arithmetic number, because the mean of its divisors is an integer number (3259872).

Almost surely, 2^28679990 is an apocalyptic number.

28679990 is a deficient number, since it is larger than the sum of its proper divisors (23477962).

28679990 is a wasteful number, since it uses less digits than its factorization.

28679990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29671.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 28679990 is about 5355.3702019562. The cubic root of 28679990 is about 306.0974172581.

The spelling of 28679990 in words is "twenty-eight million, six hundred seventy-nine thousand, nine hundred ninety".