28977742 has 4 divisors (see below), whose sum is σ = 43466616. Its totient is φ = 14488870.

The previous prime is 28977737. The next prime is 28977749. The reversal of 28977742 is 24777982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24777982 = 2 ⋅12388991.

It is a junction number, because it is equal to n+sod(n) for n = 28977692 and 28977701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28977749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7244434 + ... + 7244437.

It is an arithmetic number, because the mean of its divisors is an integer number (10866654).

Almost surely, 2^28977742 is an apocalyptic number.

28977742 is a deficient number, since it is larger than the sum of its proper divisors (14488874).

28977742 is a wasteful number, since it uses less digits than its factorization.

28977742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14488873.

The product of its digits is 395136, while the sum is 46.

The square root of 28977742 is about 5383.0978070252. The cubic root of 28977742 is about 307.1530605794.

The spelling of 28977742 in words is "twenty-eight million, nine hundred seventy-seven thousand, seven hundred forty-two".