1972420776 has 24 divisors (see below), whose sum is σ = 5341973130. Its totient is φ = 657473568.

The previous prime is 1972420693. The next prime is 1972420781. The reversal of 1972420776 is 6770242791.

It can be written as a sum of positive squares in only one way, i.e., 1786752900 + 185667876 = 42270^2 + 13626^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13697295 + ... + 13697438.

Almost surely, 2^1972420776 is an apocalyptic number.

It is an amenable number.

1972420776 is an abundant number, since it is smaller than the sum of its proper divisors (3369552354).

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

1972420776 is a wasteful number, since it uses less digits than its factorization.

1972420776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27394745 (or 27394738 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The square root of 1972420776 is about 44411.9440691353. The cubic root of 1972420776 is about 1254.1029501187.

The spelling of 1972420776 in words is "one billion, nine hundred seventy-two million, four hundred twenty thousand, seven hundred seventy-six".