1977266960 has 40 divisors (see below), whose sum is σ = 4599020376. Its totient is φ = 790584320.

The previous prime is 1977266959. The next prime is 1977266969. The reversal of 1977266960 is 696627791.

It can be written as a sum of positive squares in 4 ways, for example, as 488233216 + 1489033744 = 22096^2 + 38588^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1977266960² = 7819169262215283200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1977266969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334430 + ... + 340290.

Almost surely, 2^1977266960 is an apocalyptic number.

1977266960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1977266960 is an abundant number, since it is smaller than the sum of its proper divisors (2621753416).

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

1977266960 is a wasteful number, since it uses less digits than its factorization.

1977266960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10091 (or 10085 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 53.

The square root of 1977266960 is about 44466.4700645329. The cubic root of 1977266960 is about 1255.1292089843.

The spelling of 1977266960 in words is "one billion, nine hundred seventy-seven million, two hundred sixty-six thousand, nine hundred sixty".