28192740 has 24 divisors (see below), whose sum is σ = 78939840. Its totient is φ = 7518048.

The previous prime is 28192739. The next prime is 28192763. The reversal of 28192740 is 4729182.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234880 + ... + 234999.

It is an arithmetic number, because the mean of its divisors is an integer number (3289160).

Almost surely, 2^28192740 is an apocalyptic number.

28192740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28192740 is an abundant number, since it is smaller than the sum of its proper divisors (50747100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28192740 is a wasteful number, since it uses less digits than its factorization.

28192740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469891 (or 469889 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 28192740 is about 5309.6836063931. The cubic root of 28192740 is about 304.3540571277.

The spelling of 28192740 in words is "twenty-eight million, one hundred ninety-two thousand, seven hundred forty".