802685440 has 40 divisors (see below), whose sum is σ = 1924569900. Its totient is φ = 321073152.

The previous prime is 802685407. The next prime is 802685479. The reversal of 802685440 is 44586208.

It can be written as a sum of positive squares in 2 ways, for example, as 767068416 + 35617024 = 27696^2 + 5968^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 802685440.

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, 154215 + ... + 159334.

Almost surely, 2^802685440 is an apocalyptic number.

802685440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

802685440 is an abundant number, since it is smaller than the sum of its proper divisors (1121884460).

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

802685440 is an equidigital number, since it uses as much as digits as its factorization.

802685440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313572 (or 313556 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 37.

The square root of 802685440 is about 28331.7037962774. The cubic root of 802685440 is about 929.3553323135.

The spelling of 802685440 in words is "eight hundred two million, six hundred eighty-five thousand, four hundred forty".