1398941626 has 4 divisors (see below), whose sum is σ = 2098412442. Its totient is φ = 699470812.

The previous prime is 1398941623. The next prime is 1398941629. The reversal of 1398941626 is 6261498931.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1398941623) and next prime (1398941629).

It can be written as a sum of positive squares in only one way, i.e., 1125535401 + 273406225 = 33549^2 + 16535^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1398941626.

It is not an unprimeable number, because it can be changed into a prime (1398941623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349735405 + ... + 349735408.

Almost surely, 2^1398941626 is an apocalyptic number.

1398941626 is a deficient number, since it is larger than the sum of its proper divisors (699470816).

1398941626 is an equidigital number, since it uses as much as digits as its factorization.

1398941626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699470815.

The product of its digits is 559872, while the sum is 49.

The square root of 1398941626 is about 37402.4280762626. The cubic root of 1398941626 is about 1118.4069683256.

The spelling of 1398941626 in words is "one billion, three hundred ninety-eight million, nine hundred forty-one thousand, six hundred twenty-six".