1390140046 has 8 divisors (see below), whose sum is σ = 2091873024. Its totient is φ = 692849040.

The previous prime is 1390140043. The next prime is 1390140047. The reversal of 1390140046 is 6400410931.

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

It is a junction number, because it is equal to n+sod(n) for n = 1390139996 and 1390140023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390140043) 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, 1109710 + ... + 1110961.

It is an arithmetic number, because the mean of its divisors is an integer number (261484128).

Almost surely, 2^1390140046 is an apocalyptic number.

1390140046 is a deficient number, since it is larger than the sum of its proper divisors (701732978).

1390140046 is a wasteful number, since it uses less digits than its factorization.

1390140046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2220986.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1390140046 is about 37284.5818804503. The cubic root of 1390140046 is about 1116.0565092380.

Adding to 1390140046 its reverse (6400410931), we get a palindrome (7790550977).

The spelling of 1390140046 in words is "one billion, three hundred ninety million, one hundred forty thousand, forty-six".