1397380506 has 8 divisors (see below), whose sum is σ = 2794761024. Its totient is φ = 465793500.

The previous prime is 1397380499. The next prime is 1397380507. The reversal of 1397380506 is 6050837931.

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

1397380506 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1397380507) 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, 116448370 + ... + 116448381.

It is an arithmetic number, because the mean of its divisors is an integer number (349345128).

Almost surely, 2^1397380506 is an apocalyptic number.

1397380506 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1397380506 is a wasteful number, since it uses less digits than its factorization.

1397380506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232896756.

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 1397380506 is about 37381.5530174978. The cubic root of 1397380506 is about 1117.9907924310.

The spelling of 1397380506 in words is "one billion, three hundred ninety-seven million, three hundred eighty thousand, five hundred six".