1390303040 has 56 divisors (see below), whose sum is σ = 3783616512. Its totient is φ = 476674560.

The previous prime is 1390303001. The next prime is 1390303063. The reversal of 1390303040 is 403030931.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-3 number, since 3×1390303040³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1390302997 and 1390303015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308096 + ... + 312575.

Almost surely, 2^1390303040 is an apocalyptic number.

1390303040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1390303040 is an abundant number, since it is smaller than the sum of its proper divisors (2393313472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1390303040 is an equidigital number, since it uses as much as digits as its factorization.

1390303040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620695 (or 620685 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 1390303040 is about 37286.7676260627. The cubic root of 1390303040 is about 1116.1001267632.

Adding to 1390303040 its reverse (403030931), we get a palindrome (1793333971).

The spelling of 1390303040 in words is "one billion, three hundred ninety million, three hundred three thousand, forty".