790040 has 16 divisors (see below), whose sum is σ = 1777680. Its totient is φ = 316000.

The previous prime is 790033. The next prime is 790043. The reversal of 790040 is 40097.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 789994 and 790021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (790043) by changing a digit.

790040 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9836 + ... + 9915.

It is an arithmetic number, because the mean of its divisors is an integer number (111105).

2⁷⁹⁰⁰⁴⁰ is an apocalyptic number.

It is an amenable number.

790040 is an abundant number, since it is smaller than the sum of its proper divisors (987640).

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

790040 is a wasteful number, since it uses less digits than its factorization.

790040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19762 (or 19758 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 790040 is about 888.8419432048. The cubic root of 790040 is about 92.4449148528. Note that the first 3 decimals are identical.

The spelling of 790040 in words is "seven hundred ninety thousand, forty".