1385651900 has 36 divisors (see below), whose sum is σ = 3110556120. Its totient is φ = 535147200.

The previous prime is 1385651881. The next prime is 1385651923. The reversal of 1385651900 is 91565831.

It is a super-2 number, since 2×1385651900² = 3840062375947220000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 236006 + ... + 241805.

Almost surely, 2^1385651900 is an apocalyptic number.

1385651900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1385651900 is an abundant number, since it is smaller than the sum of its proper divisors (1724904220).

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

1385651900 is a wasteful number, since it uses less digits than its factorization.

1385651900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477854 (or 477847 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 1385651900 is about 37224.3455281621. The cubic root of 1385651900 is about 1114.8541304077.

It can be divided in two parts, 13856 and 51900, that added together give a palindrome (65756).

The spelling of 1385651900 in words is "one billion, three hundred eighty-five million, six hundred fifty-one thousand, nine hundred".