790280389 has 4 divisors (see below), whose sum is σ = 790900524. Its totient is φ = 789660256.

The previous prime is 790280383. The next prime is 790280399. The reversal of 790280389 is 983082097.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 374732164 + 415548225 = 19358^2 + 20385^2 .

It is a cyclic number.

It is not a de Polignac number, because 790280389 - 2⁹ = 790279877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (790280383) 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, 308152 + ... + 310705.

It is an arithmetic number, because the mean of its divisors is an integer number (197725131).

Almost surely, 2^790280389 is an apocalyptic number.

It is an amenable number.

790280389 is a deficient number, since it is larger than the sum of its proper divisors (620135).

790280389 is a wasteful number, since it uses less digits than its factorization.

790280389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620134.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 790280389 is about 28111.9260990776. The cubic root of 790280389 is about 924.5429011108.

The spelling of 790280389 in words is "seven hundred ninety million, two hundred eighty thousand, three hundred eighty-nine".