28481740 has 36 divisors (see below), whose sum is σ = 69579216. Its totient is φ = 9764832.

The previous prime is 28481737. The next prime is 28481759. The reversal of 28481740 is 4718482.

It is a super-2 number, since 2×28481740² = 1622419026855200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28481696 and 28481705.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13552 + ... + 15511.

It is an arithmetic number, because the mean of its divisors is an integer number (1932756).

Almost surely, 2^28481740 is an apocalyptic number.

28481740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28481740 is an abundant number, since it is smaller than the sum of its proper divisors (41097476).

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

28481740 is a wasteful number, since it uses less digits than its factorization.

28481740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29086 (or 29077 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 28481740 is about 5336.8286463030. The cubic root of 28481740 is about 305.3904879351.

The spelling of 28481740 in words is "twenty-eight million, four hundred eighty-one thousand, seven hundred forty".