1390587081 has 8 divisors (see below), whose sum is σ = 1996740480. Its totient is φ = 855745872.

The previous prime is 1390587071. The next prime is 1390587113. The reversal of 1390587081 is 1807850931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1390587081 - 2⁶ = 1390587017 is a prime.

It is a super-2 number, since 2×1390587081² = 3867464859688201122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1390587031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17828001 + ... + 17828078.

It is an arithmetic number, because the mean of its divisors is an integer number (249592560).

Almost surely, 2^1390587081 is an apocalyptic number.

It is an amenable number.

1390587081 is a deficient number, since it is larger than the sum of its proper divisors (606153399).

1390587081 is a wasteful number, since it uses less digits than its factorization.

1390587081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35656095.

The product of its (nonzero) digits is 60480, while the sum is 42.

The square root of 1390587081 is about 37290.5763028677. The cubic root of 1390587081 is about 1116.1761285653.

The spelling of 1390587081 in words is "one billion, three hundred ninety million, five hundred eighty-seven thousand, eighty-one".