840502428 has 12 divisors (see below), whose sum is σ = 1961172360. Its totient is φ = 280167472.

The previous prime is 840502393. The next prime is 840502459. The reversal of 840502428 is 824205048.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

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, 35020923 + ... + 35020946.

It is an arithmetic number, because the mean of its divisors is an integer number (163431030).

Almost surely, 2^840502428 is an apocalyptic number.

It is an amenable number.

840502428 is an abundant number, since it is smaller than the sum of its proper divisors (1120669932).

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

840502428 is a wasteful number, since it uses less digits than its factorization.

840502428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70041876 (or 70041874 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 33.

The square root of 840502428 is about 28991.4199031369. The cubic root of 840502428 is about 943.7268777400.

The spelling of 840502428 in words is "eight hundred forty million, five hundred two thousand, four hundred twenty-eight".