231949980 has 120 divisors (see below), whose sum is σ = 738841488. Its totient is φ = 60901632.

The previous prime is 231949951. The next prime is 231949987. The reversal of 231949980 is 89949132.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231949987) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 107472 + ... + 109608.

Almost surely, 2^231949980 is an apocalyptic number.

231949980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231949980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (369420744).

231949980 is an abundant number, since it is smaller than the sum of its proper divisors (506891508).

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

231949980 is a wasteful number, since it uses less digits than its factorization.

231949980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2225 (or 2214 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 231949980 is about 15229.9041362709. The cubic root of 231949980 is about 614.4192018230.

The spelling of 231949980 in words is "two hundred thirty-one million, nine hundred forty-nine thousand, nine hundred eighty".