440394228 has 36 divisors (see below), whose sum is σ = 1121728608. Its totient is φ = 145675920.

The previous prime is 440394209. The next prime is 440394247. The reversal of 440394228 is 822493044.

440394228 is a `hidden beast` number, since 4 + 40 + 394 + 228 = 666.

It is an interprime number because it is at equal distance from previous prime (440394209) and next prime (440394247).

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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 = 440394192 and 440394201.

It is a congruent number.

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, 41976 + ... + 51407.

It is an arithmetic number, because the mean of its divisors is an integer number (31159128).

Almost surely, 2^440394228 is an apocalyptic number.

It is an amenable number.

440394228 is an abundant number, since it is smaller than the sum of its proper divisors (681334380).

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

440394228 is a wasteful number, since it uses less digits than its factorization.

440394228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93524 (or 93519 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 440394228 is about 20985.5719007131. The cubic root of 440394228 is about 760.8175804567.

The spelling of 440394228 in words is "four hundred forty million, three hundred ninety-four thousand, two hundred twenty-eight".