940809428 has 12 divisors (see below), whose sum is σ = 1773064020. Its totient is φ = 434219712.

The previous prime is 940809403. The next prime is 940809433. The reversal of 940809428 is 824908049.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 537683344 + 403126084 = 23188^2 + 20078^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9046193 + ... + 9046296.

It is an arithmetic number, because the mean of its divisors is an integer number (147755335).

Almost surely, 2^940809428 is an apocalyptic number.

It is an amenable number.

940809428 is a deficient number, since it is larger than the sum of its proper divisors (832254592).

940809428 is a wasteful number, since it uses less digits than its factorization.

940809428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18092506 (or 18092504 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 940809428 is about 30672.6169082457. The cubic root of 940809428 is about 979.8671998309.

The spelling of 940809428 in words is "nine hundred forty million, eight hundred nine thousand, four hundred twenty-eight".