1390628239 has 32 divisors (see below), whose sum is σ = 1917651456. Its totient is φ = 973192320.

The previous prime is 1390628233. The next prime is 1390628251. The reversal of 1390628239 is 9328260931.

It is a cyclic number.

It is not a de Polignac number, because 1390628239 - 2¹¹ = 1390626191 is a prime.

It is a super-2 number, since 2×1390628239² = 3867693798208482242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1390628195 and 1390628204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390628233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18264 + ... + 55810.

It is an arithmetic number, because the mean of its divisors is an integer number (59926608).

Almost surely, 2^1390628239 is an apocalyptic number.

1390628239 is a deficient number, since it is larger than the sum of its proper divisors (527023217).

1390628239 is a wasteful number, since it uses less digits than its factorization.

1390628239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37615.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 1390628239 is about 37291.1281540261. The cubic root of 1390628239 is about 1116.1871404908.

The spelling of 1390628239 in words is "one billion, three hundred ninety million, six hundred twenty-eight thousand, two hundred thirty-nine".