1386493290 has 384 divisors, whose sum is σ = 4723310592. Its totient is φ = 274337280.

The previous prime is 1386493271. The next prime is 1386493301. The reversal of 1386493290 is 923946831.

It is a happy number.

1386493290 is a `hidden beast` number, since 138 + 6 + 493 + 29 + 0 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 10917207 + ... + 10917333.

It is an arithmetic number, because the mean of its divisors is an integer number (12300288).

Almost surely, 2^1386493290 is an apocalyptic number.

1386493290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1386493290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2361655296).

1386493290 is an abundant number, since it is smaller than the sum of its proper divisors (3336817302).

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

1386493290 is a wasteful number, since it uses less digits than its factorization.

1386493290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 1386493290 is about 37235.6454220952. The cubic root of 1386493290 is about 1115.0797371706.

The spelling of 1386493290 in words is "one billion, three hundred eighty-six million, four hundred ninety-three thousand, two hundred ninety".