28151266 has 32 divisors (see below), whose sum is σ = 49932288. Its totient is φ = 11735040.

The previous prime is 28151251. The next prime is 28151267. The reversal of 28151266 is 66215182.

It is not an unprimeable number, because it can be changed into a prime (28151267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73311 + ... + 73693.

It is an arithmetic number, because the mean of its divisors is an integer number (1560384).

Almost surely, 2^28151266 is an apocalyptic number.

28151266 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28151266 is a deficient number, since it is larger than the sum of its proper divisors (21781022).

28151266 is a wasteful number, since it uses less digits than its factorization.

28151266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666.

The product of its digits is 5760, while the sum is 31.

The square root of 28151266 is about 5305.7766632228. The cubic root of 28151266 is about 304.2047400225.

The spelling of 28151266 in words is "twenty-eight million, one hundred fifty-one thousand, two hundred sixty-six".