1385772340 has 36 divisors (see below), whose sum is σ = 3091388076. Its totient is φ = 521700352.

The previous prime is 1385772331. The next prime is 1385772341. The reversal of 1385772340 is 432775831.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 14699556 + 1371072784 = 3834^2 + 37028^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1385772293 and 1385772302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385772341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114097 + ... + 125656.

It is an arithmetic number, because the mean of its divisors is an integer number (85871891).

Almost surely, 2^1385772340 is an apocalyptic number.

1385772340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1385772340 is an abundant number, since it is smaller than the sum of its proper divisors (1705615736).

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

1385772340 is a wasteful number, since it uses less digits than its factorization.

1385772340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239796 (or 239777 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 1385772340 is about 37225.9632514728. The cubic root of 1385772340 is about 1114.8864302808.

The spelling of 1385772340 in words is "one billion, three hundred eighty-five million, seven hundred seventy-two thousand, three hundred forty".