231677740 has 24 divisors (see below), whose sum is σ = 556026912. Its totient is φ = 79432320.

The previous prime is 231677729. The next prime is 231677749. The reversal of 231677740 is 47776132.

It is a self number, because there is not a number n which added to its sum of digits gives 231677740.

It is not an unprimeable number, because it can be changed into a prime (231677749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 827281 + ... + 827560.

It is an arithmetic number, because the mean of its divisors is an integer number (23167788).

Almost surely, 2^231677740 is an apocalyptic number.

231677740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231677740 is an abundant number, since it is smaller than the sum of its proper divisors (324349172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231677740 is a wasteful number, since it uses less digits than its factorization.

231677740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1654857 (or 1654855 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 37.

The square root of 231677740 is about 15220.9638328195. The cubic root of 231677740 is about 614.1787261715.

Adding to 231677740 its product of nonzero digits (49392), we get a palindrome (231727132).

The spelling of 231677740 in words is "two hundred thirty-one million, six hundred seventy-seven thousand, seven hundred forty".