1385265810 has 16 divisors (see below), whose sum is σ = 3324638016. Its totient is φ = 369404208.

The previous prime is 1385265809. The next prime is 1385265853. The reversal of 1385265810 is 185625831.

It is a super-2 number, since 2×1385265810² = 3837922728709912200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23087734 + ... + 23087793.

It is an arithmetic number, because the mean of its divisors is an integer number (207789876).

Almost surely, 2^1385265810 is an apocalyptic number.

1385265810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1385265810 is an abundant number, since it is smaller than the sum of its proper divisors (1939372206).

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

1385265810 is a wasteful number, since it uses less digits than its factorization.

1385265810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46175537.

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 1385265810 is about 37219.1591791110. The cubic root of 1385265810 is about 1114.7505752952.

The spelling of 1385265810 in words is "one billion, three hundred eighty-five million, two hundred sixty-five thousand, eight hundred ten".