28879340 has 24 divisors (see below), whose sum is σ = 69310752. Its totient is φ = 9901440.

The previous prime is 28879339. The next prime is 28879363. The reversal of 28879340 is 4397882.

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, 103001 + ... + 103280.

It is an arithmetic number, because the mean of its divisors is an integer number (2887948).

Almost surely, 2^28879340 is an apocalyptic number.

28879340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28879340 is an abundant number, since it is smaller than the sum of its proper divisors (40431412).

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

28879340 is a wasteful number, since it uses less digits than its factorization.

28879340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206297 (or 206295 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 28879340 is about 5373.9501300254. The cubic root of 28879340 is about 306.8049916830.

The spelling of 28879340 in words is "twenty-eight million, eight hundred seventy-nine thousand, three hundred forty".