28013977 has 8 divisors (see below), whose sum is σ = 30951936. Its totient is φ = 25219392.

The previous prime is 28013963. The next prime is 28013983. The reversal of 28013977 is 77931082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28013977 - 2²³ = 19625369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28013917) 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, 35433 + ... + 36214.

It is an arithmetic number, because the mean of its divisors is an integer number (3868992).

Almost surely, 2^28013977 is an apocalyptic number.

It is an amenable number.

28013977 is a deficient number, since it is larger than the sum of its proper divisors (2937959).

28013977 is a wasteful number, since it uses less digits than its factorization.

28013977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71687.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 28013977 is about 5292.8231597135. The cubic root of 28013977 is about 303.7094154541.

The spelling of 28013977 in words is "twenty-eight million, thirteen thousand, nine hundred seventy-seven".