1390782429 has 12 divisors (see below), whose sum is σ = 2009523100. Its totient is φ = 926904384.

The previous prime is 1390782403. The next prime is 1390782433. The reversal of 1390782429 is 9242870931.

It can be written as a sum of positive squares in 2 ways, for example, as 630512100 + 760270329 = 25110^2 + 27573^2 .

It is not a de Polignac number, because 1390782429 - 2⁷ = 1390782301 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 (1390782479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9867 + ... + 53655.

Almost surely, 2^1390782429 is an apocalyptic number.

It is an amenable number.

1390782429 is a deficient number, since it is larger than the sum of its proper divisors (618740671).

1390782429 is a wasteful number, since it uses less digits than its factorization.

1390782429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47324 (or 47321 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 1390782429 is about 37293.1954785320. The cubic root of 1390782429 is about 1116.2283924779.

The spelling of 1390782429 in words is "one billion, three hundred ninety million, seven hundred eighty-two thousand, four hundred twenty-nine".