1388052774 has 20 divisors (see below), whose sum is σ = 3110266764. Its totient is φ = 462684204.

The previous prime is 1388052763. The next prime is 1388052779. The reversal of 1388052774 is 4772508831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388052779) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4283952 + ... + 4284275.

Almost surely, 2^1388052774 is an apocalyptic number.

1388052774 is an abundant number, since it is smaller than the sum of its proper divisors (1722213990).

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

1388052774 is an equidigital number, since it uses as much as digits as its factorization.

1388052774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8568241 (or 8568232 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 1388052774 is about 37256.5802778516. The cubic root of 1388052774 is about 1115.4976493853.

The spelling of 1388052774 in words is "one billion, three hundred eighty-eight million, fifty-two thousand, seven hundred seventy-four".