988561431 has 48 divisors (see below), whose sum is σ = 1765895040. Its totient is φ = 523920960.

The previous prime is 988561429. The next prime is 988561463. The reversal of 988561431 is 134165889.

988561431 is a `hidden beast` number, since 9 + 88 + 561 + 4 + 3 + 1 = 666.

It is not a de Polignac number, because 988561431 - 2¹ = 988561429 is a prime.

It is a super-2 number, since 2×988561431² = 1954507405721535522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (988561411) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4240 + ... + 44666.

It is an arithmetic number, because the mean of its divisors is an integer number (36789480).

Almost surely, 2^988561431 is an apocalyptic number.

988561431 is a deficient number, since it is larger than the sum of its proper divisors (777333609).

988561431 is a wasteful number, since it uses less digits than its factorization.

988561431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40476 (or 40473 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 988561431 is about 31441.3967724082. The cubic root of 988561431 is about 996.1725126981.

The spelling of 988561431 in words is "nine hundred eighty-eight million, five hundred sixty-one thousand, four hundred thirty-one".