28734740 has 12 divisors (see below), whose sum is σ = 60342996. Its totient is φ = 11493888.

The previous prime is 28734733. The next prime is 28734763. The reversal of 28734740 is 4743782.

It can be written as a sum of positive squares in 2 ways, for example, as 3794704 + 24940036 = 1948^2 + 4994^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28734740.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 718349 + ... + 718388.

It is an arithmetic number, because the mean of its divisors is an integer number (5028583).

Almost surely, 2^28734740 is an apocalyptic number.

28734740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28734740 is an abundant number, since it is smaller than the sum of its proper divisors (31608256).

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

28734740 is a wasteful number, since it uses less digits than its factorization.

28734740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1436746 (or 1436744 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 28734740 is about 5360.4794561681. The cubic root of 28734740 is about 306.2920730757.

The spelling of 28734740 in words is "twenty-eight million, seven hundred thirty-four thousand, seven hundred forty".