1678254772 has 6 divisors (see below), whose sum is σ = 2936945858. Its totient is φ = 839127384.

The previous prime is 1678254733. The next prime is 1678254779. The reversal of 1678254772 is 2774528761.

It can be written as a sum of positive squares in only one way, i.e., 1678213156 + 41616 = 40966^2 + 204^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1678254779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209781843 + ... + 209781850.

Almost surely, 2^1678254772 is an apocalyptic number.

It is an amenable number.

1678254772 is a deficient number, since it is larger than the sum of its proper divisors (1258691086).

1678254772 is a wasteful number, since it uses less digits than its factorization.

1678254772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419563697 (or 419563695 counting only the distinct ones).

The product of its digits is 1317120, while the sum is 49.

The square root of 1678254772 is about 40966.5079302593. The cubic root of 1678254772 is about 1188.3726011406.

The spelling of 1678254772 in words is "one billion, six hundred seventy-eight million, two hundred fifty-four thousand, seven hundred seventy-two".