1377986772 has 48 divisors (see below), whose sum is σ = 3345914880. Its totient is φ = 441032928.

The previous prime is 1377986759. The next prime is 1377986777. The reversal of 1377986772 is 2776897731.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1377986777) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7813 + ... + 53075.

It is an arithmetic number, because the mean of its divisors is an integer number (69706560).

Almost surely, 2^1377986772 is an apocalyptic number.

1377986772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1377986772 is an abundant number, since it is smaller than the sum of its proper divisors (1967928108).

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

1377986772 is a wasteful number, since it uses less digits than its factorization.

1377986772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45372 (or 45370 counting only the distinct ones).

The product of its digits is 6223392, while the sum is 57.

The square root of 1377986772 is about 37121.2442140616. The cubic root of 1377986772 is about 1112.7946171192.

The spelling of 1377986772 in words is "one billion, three hundred seventy-seven million, nine hundred eighty-six thousand, seven hundred seventy-two".