1390283640 has 48 divisors (see below), whose sum is σ = 4518423000. Its totient is φ = 370742208.

The previous prime is 1390283627. The next prime is 1390283659. The reversal of 1390283640 is 463820931.

1390283640 is a `hidden beast` number, since 1 + 3 + 9 + 0 + 2 + 8 + 3 + 640 = 666.

1390283640 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1390283595 and 1390283604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1930590 + ... + 1931309.

Almost surely, 2^1390283640 is an apocalyptic number.

1390283640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1390283640 is an abundant number, since it is smaller than the sum of its proper divisors (3128139360).

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

1390283640 is a wasteful number, since it uses less digits than its factorization.

1390283640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3861916 (or 3861909 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 1390283640 is about 37286.5074792478. The cubic root of 1390283640 is about 1116.0949354626.

The spelling of 1390283640 in words is "one billion, three hundred ninety million, two hundred eighty-three thousand, six hundred forty".