1977208252 has 12 divisors (see below), whose sum is σ = 3465417816. Its totient is φ = 987088880.

The previous prime is 1977208237. The next prime is 1977208253. The reversal of 1977208252 is 2528027791.

It is a junction number, because it is equal to n+sod(n) for n = 1977208199 and 1977208208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1977208253) 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, 375874 + ... + 381097.

It is an arithmetic number, because the mean of its divisors is an integer number (288784818).

Almost surely, 2^1977208252 is an apocalyptic number.

It is an amenable number.

1977208252 is a deficient number, since it is larger than the sum of its proper divisors (1488209564).

1977208252 is a wasteful number, since it uses less digits than its factorization.

1977208252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757628 (or 757626 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 43.

The square root of 1977208252 is about 44465.8099217815. The cubic root of 1977208252 is about 1255.1167866430.

The spelling of 1977208252 in words is "one billion, nine hundred seventy-seven million, two hundred eight thousand, two hundred fifty-two".