1388077449 has 16 divisors (see below), whose sum is σ = 2024663040. Its totient is φ = 838908560.

The previous prime is 1388077429. The next prime is 1388077463. The reversal of 1388077449 is 9447708831.

It is a cyclic number.

It is not a de Polignac number, because 1388077449 - 2¹³ = 1388069257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1388077429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46737 + ... + 70430.

It is an arithmetic number, because the mean of its divisors is an integer number (126541440).

Almost surely, 2^1388077449 is an apocalyptic number.

It is an amenable number.

1388077449 is a deficient number, since it is larger than the sum of its proper divisors (636585591).

1388077449 is a wasteful number, since it uses less digits than its factorization.

1388077449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117540.

The product of its (nonzero) digits is 1354752, while the sum is 51.

The square root of 1388077449 is about 37256.9114259355. The cubic root of 1388077449 is about 1115.5042593024.

The spelling of 1388077449 in words is "one billion, three hundred eighty-eight million, seventy-seven thousand, four hundred forty-nine".