28739392 has 28 divisors (see below), whose sum is σ = 62215776. Its totient is φ = 13063040.

The previous prime is 28739383. The next prime is 28739393. The reversal of 28739392 is 29393782.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28739393) 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 3 ways as a sum of consecutive naturals, for example, 19708 + ... + 21115.

It is an arithmetic number, because the mean of its divisors is an integer number (2221992).

Almost surely, 2^28739392 is an apocalyptic number.

28739392 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28739392 is an abundant number, since it is smaller than the sum of its proper divisors (33476384).

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

28739392 is a wasteful number, since it uses less digits than its factorization.

28739392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40846 (or 40836 counting only the distinct ones).

The product of its digits is 163296, while the sum is 43.

The square root of 28739392 is about 5360.9133550170. The cubic root of 28739392 is about 306.3086011974.

The spelling of 28739392 in words is "twenty-eight million, seven hundred thirty-nine thousand, three hundred ninety-two".