802639940 has 12 divisors (see below), whose sum is σ = 1685543916. Its totient is φ = 321055968.

The previous prime is 802639907. The next prime is 802639949. The reversal of 802639940 is 49936208.

It is a happy number.

802639940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 134003776 + 668636164 = 11576^2 + 25858^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (802639949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20065979 + ... + 20066018.

It is an arithmetic number, because the mean of its divisors is an integer number (140461993).

Almost surely, 2^802639940 is an apocalyptic number.

It is an amenable number.

802639940 is an abundant number, since it is smaller than the sum of its proper divisors (882903976).

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

802639940 is a wasteful number, since it uses less digits than its factorization.

802639940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40132006 (or 40132004 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 802639940 is about 28330.9007975391. The cubic root of 802639940 is about 929.3377718992.

The spelling of 802639940 in words is "eight hundred two million, six hundred thirty-nine thousand, nine hundred forty".