1377640220 has 96 divisors (see below), whose sum is σ = 3517758720. Its totient is φ = 446653440.

The previous prime is 1377640219. The next prime is 1377640241. The reversal of 1377640220 is 220467731.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61367 + ... + 80753.

It is an arithmetic number, because the mean of its divisors is an integer number (36643320).

Almost surely, 2^1377640220 is an apocalyptic number.

1377640220 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 1377640220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1758879360).

1377640220 is an abundant number, since it is smaller than the sum of its proper divisors (2140118500).

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

1377640220 is a wasteful number, since it uses less digits than its factorization.

1377640220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19443 (or 19441 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 1377640220 is about 37116.5760813144. The cubic root of 1377640220 is about 1112.7013231581.

The spelling of 1377640220 in words is "one billion, three hundred seventy-seven million, six hundred forty thousand, two hundred twenty".