1377652420 has 12 divisors (see below), whose sum is σ = 2893070124. Its totient is φ = 551060960.

The previous prime is 1377652403. The next prime is 1377652421. The reversal of 1377652420 is 242567731.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 282307204 + 1095345216 = 16802^2 + 33096^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1377652420.

It is not an unprimeable number, because it can be changed into a prime (1377652421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34441291 + ... + 34441330.

It is an arithmetic number, because the mean of its divisors is an integer number (241089177).

Almost surely, 2^1377652420 is an apocalyptic number.

1377652420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1377652420 is an abundant number, since it is smaller than the sum of its proper divisors (1515417704).

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

1377652420 is a wasteful number, since it uses less digits than its factorization.

1377652420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68882630 (or 68882628 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 1377652420 is about 37116.7404280063. The cubic root of 1377652420 is about 1112.7046077399.

It can be divided in two parts, 137765 and 2420, that added together give a triangular number (140185 = T₅₂₉).

The spelling of 1377652420 in words is "one billion, three hundred seventy-seven million, six hundred fifty-two thousand, four hundred twenty".