28474740 has 216 divisors, whose sum is σ = 105810432. Its totient is φ = 6298560.

The previous prime is 28474717. The next prime is 28474741. The reversal of 28474740 is 4747482.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 28474695 and 28474704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28474741) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 918525 + ... + 918555.

Almost surely, 2^28474740 is an apocalyptic number.

28474740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28474740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52905216).

28474740 is an abundant number, since it is smaller than the sum of its proper divisors (77335692).

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

28474740 is an equidigital number, since it uses as much as digits as its factorization.

28474740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71 (or 48 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 36.

The square root of 28474740 is about 5336.1727858082. The cubic root of 28474740 is about 305.3654671257.

The spelling of 28474740 in words is "twenty-eight million, four hundred seventy-four thousand, seven hundred forty".