1378120528 has 10 divisors (see below), whose sum is σ = 2670108554. Its totient is φ = 689060256.

The previous prime is 1378120493. The next prime is 1378120543. The reversal of 1378120528 is 8250218731.

It can be written as a sum of positive squares in only one way, i.e., 1109422864 + 268697664 = 33308^2 + 16392^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43066251 + ... + 43066282.

Almost surely, 2^1378120528 is an apocalyptic number.

It is an amenable number.

1378120528 is a deficient number, since it is larger than the sum of its proper divisors (1291988026).

1378120528 is an equidigital number, since it uses as much as digits as its factorization.

1378120528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86132541 (or 86132535 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 1378120528 is about 37123.0457802158. The cubic root of 1378120528 is about 1112.8306208856.

The spelling of 1378120528 in words is "one billion, three hundred seventy-eight million, one hundred twenty thousand, five hundred twenty-eight".