2778042132 has 18 divisors (see below), whose sum is σ = 7022273258. Its totient is φ = 926014032.

The previous prime is 2778042109. The next prime is 2778042139. The reversal of 2778042132 is 2312408772.

It can be written as a sum of positive squares in only one way, i.e., 1995944976 + 782097156 = 44676^2 + 27966^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 77167837 = 2778042132 / (2 + 7 + 7 + 8 + 0 + 4 + 2 + 1 + 3 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778042139) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38583883 + ... + 38583954.

Almost surely, 2^2778042132 is an apocalyptic number.

It is an amenable number.

2778042132 is an abundant number, since it is smaller than the sum of its proper divisors (4244231126).

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

2778042132 is a wasteful number, since it uses less digits than its factorization.

2778042132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77167847 (or 77167842 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 2778042132 is about 52707.1354941625. The cubic root of 2778042132 is about 1405.7657004190.

It can be divided in two parts, 277804 and 2132, that added together give a 7-th power (279936 = 6⁷).

The spelling of 2778042132 in words is "two billion, seven hundred seventy-eight million, forty-two thousand, one hundred thirty-two".