28404260 has 48 divisors (see below), whose sum is σ = 61471872. Its totient is φ = 11020800.

The previous prime is 28404251. The next prime is 28404269. The reversal of 28404260 is 6240482.

28404260 = T₃₆₀ + T₃₆₁ + ... + T₆₀₀.

It is an interprime number because it is at equal distance from previous prime (28404251) and next prime (28404269).

It is a super-2 number, since 2×28404260² = 1613603972295200, which contains 22 as substring.

28404260 is a modest number, since divided by 4260 gives 2840 as remainder.

It is not an unprimeable number, because it can be changed into a prime (28404269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117740 + ... + 117980.

It is an arithmetic number, because the mean of its divisors is an integer number (1280664).

Almost surely, 2^28404260 is an apocalyptic number.

28404260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28404260 is an abundant number, since it is smaller than the sum of its proper divisors (33067612).

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

28404260 is a wasteful number, since it uses less digits than its factorization.

28404260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 28404260 is about 5329.5647101804. The cubic root of 28404260 is about 305.1133145204.

The spelling of 28404260 in words is "twenty-eight million, four hundred four thousand, two hundred sixty".