561435387 has 24 divisors (see below), whose sum is σ = 803053056. Its totient is φ = 348797568.

The previous prime is 561435367. The next prime is 561435397. The reversal of 561435387 is 783534165.

It is not a de Polignac number, because 561435387 - 2⁸ = 561435131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561435367) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86158 + ... + 92444.

It is an arithmetic number, because the mean of its divisors is an integer number (33460544).

Almost surely, 2^561435387 is an apocalyptic number.

561435387 is a deficient number, since it is larger than the sum of its proper divisors (241617669).

561435387 is a wasteful number, since it uses less digits than its factorization.

561435387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6427 (or 6410 counting only the distinct ones).

The product of its digits is 302400, while the sum is 42.

The square root of 561435387 is about 23694.6278088515. The cubic root of 561435387 is about 824.9607018930.

The spelling of 561435387 in words is "five hundred sixty-one million, four hundred thirty-five thousand, three hundred eighty-seven".