28374740 has 24 divisors (see below), whose sum is σ = 59852520. Its totient is φ = 11299328.

The previous prime is 28374739. The next prime is 28374761. The reversal of 28374740 is 4747382.

28374740 = T₈₉ + T₉₀ + ... + T₅₅₄.

It can be written as a sum of positive squares in 4 ways, for example, as 8464 + 28366276 = 92^2 + 5326^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28374740.

It is a congruent 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, 1616 + ... + 7704.

It is an arithmetic number, because the mean of its divisors is an integer number (2493855).

Almost surely, 2^28374740 is an apocalyptic number.

28374740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28374740 is an abundant number, since it is smaller than the sum of its proper divisors (31477780).

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

28374740 is a wasteful number, since it uses less digits than its factorization.

28374740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6331 (or 6329 counting only the distinct ones).

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

The square root of 28374740 is about 5326.7945333005. The cubic root of 28374740 is about 305.0075784196.

The spelling of 28374740 in words is "twenty-eight million, three hundred seventy-four thousand, seven hundred forty".