1398761049 has 32 divisors (see below), whose sum is σ = 2188915456. Its totient is φ = 778014720.

The previous prime is 1398761027. The next prime is 1398761051. The reversal of 1398761049 is 9401678931.

It is a happy number.

It is not a de Polignac number, because 1398761049 - 2⁵ = 1398761017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1398760989 and 1398761007.

It is not an unprimeable number, because it can be changed into a prime (1398761059) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118629 + ... + 129885.

It is an arithmetic number, because the mean of its divisors is an integer number (68403608).

Almost surely, 2^1398761049 is an apocalyptic number.

It is an amenable number.

1398761049 is a deficient number, since it is larger than the sum of its proper divisors (790154407).

1398761049 is a wasteful number, since it uses less digits than its factorization.

1398761049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11425.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 1398761049 is about 37400.0140240615. The cubic root of 1398761049 is about 1118.3588445008.

The spelling of 1398761049 in words is "one billion, three hundred ninety-eight million, seven hundred sixty-one thousand, forty-nine".