1390257830 has 32 divisors (see below), whose sum is σ = 2696652000. Its totient is φ = 513004032.

The previous prime is 1390257823. The next prime is 1390257833. The reversal of 1390257830 is 387520931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390257833) 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 15 ways as a sum of consecutive naturals, for example, 337121 + ... + 341219.

It is an arithmetic number, because the mean of its divisors is an integer number (84270375).

Almost surely, 2^1390257830 is an apocalyptic number.

1390257830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1390257830 is a deficient number, since it is larger than the sum of its proper divisors (1306394170).

1390257830 is a wasteful number, since it uses less digits than its factorization.

1390257830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6728.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 1390257830 is about 37286.1613738931. The cubic root of 1390257830 is about 1116.0880288171.

The spelling of 1390257830 in words is "one billion, three hundred ninety million, two hundred fifty-seven thousand, eight hundred thirty".