1398240461 has 4 divisors (see below), whose sum is σ = 1443345024. Its totient is φ = 1353135900.

The previous prime is 1398240451. The next prime is 1398240479. The reversal of 1398240461 is 1640428931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1398240461 - 2¹⁸ = 1397978317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398240451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22552235 + ... + 22552296.

It is an arithmetic number, because the mean of its divisors is an integer number (360836256).

Almost surely, 2^1398240461 is an apocalyptic number.

It is an amenable number.

1398240461 is a deficient number, since it is larger than the sum of its proper divisors (45104563).

1398240461 is an equidigital number, since it uses as much as digits as its factorization.

1398240461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45104562.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 1398240461 is about 37393.0536463659. The cubic root of 1398240461 is about 1118.2200844561.

The spelling of 1398240461 in words is "one billion, three hundred ninety-eight million, two hundred forty thousand, four hundred sixty-one".