1381825770 has 32 divisors (see below), whose sum is σ = 3571489152. Its totient is φ = 340141632.

The previous prime is 1381825759. The next prime is 1381825771. The reversal of 1381825770 is 775281831.

It is not an unprimeable number, because it can be changed into a prime (1381825771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1771182 + ... + 1771961.

It is an arithmetic number, because the mean of its divisors is an integer number (111609036).

Almost surely, 2^1381825770 is an apocalyptic number.

1381825770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1381825770 is an abundant number, since it is smaller than the sum of its proper divisors (2189663382).

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

1381825770 is a wasteful number, since it uses less digits than its factorization.

1381825770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3543166.

The product of its (nonzero) digits is 94080, while the sum is 42.

The square root of 1381825770 is about 37172.9171575221. The cubic root of 1381825770 is about 1113.8270545179.

The spelling of 1381825770 in words is "one billion, three hundred eighty-one million, eight hundred twenty-five thousand, seven hundred seventy".