28148340 has 48 divisors (see below), whose sum is σ = 85982400. Its totient is φ = 6823680.

The previous prime is 28148339. The next prime is 28148377. The reversal of 28148340 is 4384182.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 28148298 and 28148307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20665 + ... + 21984.

It is an arithmetic number, because the mean of its divisors is an integer number (1791300).

Almost surely, 2^28148340 is an apocalyptic number.

28148340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28148340 is an abundant number, since it is smaller than the sum of its proper divisors (57834060).

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

28148340 is a wasteful number, since it uses less digits than its factorization.

28148340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42672 (or 42670 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 28148340 is about 5305.5009188577. The cubic root of 28148340 is about 304.1942001305.

The spelling of 28148340 in words is "twenty-eight million, one hundred forty-eight thousand, three hundred forty".