28377951 has 16 divisors (see below), whose sum is σ = 43440384. Its totient is φ = 16141824.

The previous prime is 28377941. The next prime is 28377953. The reversal of 28377951 is 15977382.

It is not a de Polignac number, because 28377951 - 2⁹ = 28377439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28377953) 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 in 15 ways as a sum of consecutive naturals, for example, 1791 + ... + 7743.

It is an arithmetic number, because the mean of its divisors is an integer number (2715024).

Almost surely, 2^28377951 is an apocalyptic number.

28377951 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28377951 is a deficient number, since it is larger than the sum of its proper divisors (15062433).

28377951 is a wasteful number, since it uses less digits than its factorization.

28377951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6190.

The product of its digits is 105840, while the sum is 42.

The square root of 28377951 is about 5327.0959255489. The cubic root of 28377951 is about 305.0190832815.

The spelling of 28377951 in words is "twenty-eight million, three hundred seventy-seven thousand, nine hundred fifty-one".