28714440 has 32 divisors (see below), whose sum is σ = 86143680. Its totient is φ = 7657152.

The previous prime is 28714423. The next prime is 28714457. The reversal of 28714440 is 4441782.

It is an interprime number because it is at equal distance from previous prime (28714423) and next prime (28714457).

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 = 28714398 and 28714407.

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, 119524 + ... + 119763.

It is an arithmetic number, because the mean of its divisors is an integer number (2691990).

Almost surely, 2^28714440 is an apocalyptic number.

28714440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28714440 is an abundant number, since it is smaller than the sum of its proper divisors (57429240).

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

28714440 is a wasteful number, since it uses less digits than its factorization.

28714440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239301 (or 239297 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 28714440 is about 5358.5856342882. The cubic root of 28714440 is about 306.2199281870.

The spelling of 28714440 in words is "twenty-eight million, seven hundred fourteen thousand, four hundred forty".