1386671400 has 120 divisors (see below), whose sum is σ = 4816171470. Its totient is φ = 369774720.

The previous prime is 1386671389. The next prime is 1386671441. The reversal of 1386671400 is 41766831.

It can be written as a sum of positive squares in 3 ways, for example, as 580906404 + 805764996 = 24102^2 + 28386^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 26599 + ... + 58998.

Almost surely, 2^1386671400 is an apocalyptic number.

1386671400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1386671400 is an abundant number, since it is smaller than the sum of its proper divisors (3429500070).

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

1386671400 is a wasteful number, since it uses less digits than its factorization.

1386671400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85625 (or 85607 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 1386671400 is about 37238.0370051913. The cubic root of 1386671400 is about 1115.1274831279.

The spelling of 1386671400 in words is "one billion, three hundred eighty-six million, six hundred seventy-one thousand, four hundred".