1377313920 has 192 divisors, whose sum is σ = 4775509440. Its totient is φ = 365783040.

The previous prime is 1377313909. The next prime is 1377313921. The reversal of 1377313920 is 293137731.

It is a tau number, because it is divible by the number of its divisors (192).

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

It is not an unprimeable number, because it can be changed into a prime (1377313921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2804875 + ... + 2805365.

It is an arithmetic number, because the mean of its divisors is an integer number (24872445).

Almost surely, 2^1377313920 is an apocalyptic number.

1377313920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1377313920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2387754720).

1377313920 is an abundant number, since it is smaller than the sum of its proper divisors (3398195520).

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

1377313920 is a wasteful number, since it uses less digits than its factorization.

1377313920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003 (or 988 counting only the distinct ones).

The product of its (nonzero) digits is 23814, while the sum is 36.

The square root of 1377313920 is about 37112.1802108149. The cubic root of 1377313920 is about 1112.6134668597.

The spelling of 1377313920 in words is "one billion, three hundred seventy-seven million, three hundred thirteen thousand, nine hundred twenty".