28377970 has 16 divisors (see below), whose sum is σ = 51587928. Its totient is φ = 11238400.

The previous prime is 28377961. The next prime is 28377971. The reversal of 28377970 is 7977382.

It can be written as a sum of positive squares in 4 ways, for example, as 20820969 + 7557001 = 4563^2 + 2749^2 .

It is not an unprimeable number, because it can be changed into a prime (28377971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13039 + ... + 15058.

Almost surely, 2^28377970 is an apocalyptic number.

28377970 is a deficient number, since it is larger than the sum of its proper divisors (23209958).

28377970 is a wasteful number, since it uses less digits than its factorization.

28377970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28205.

The product of its (nonzero) digits is 148176, while the sum is 43.

The square root of 28377970 is about 5327.0977088843. The cubic root of 28377970 is about 305.0191513550.

The spelling of 28377970 in words is "twenty-eight million, three hundred seventy-seven thousand, nine hundred seventy".