11731380 has 48 divisors (see below), whose sum is σ = 34280064. Its totient is φ = 2992000.

The previous prime is 11731351. The next prime is 11731381. The reversal of 11731380 is 8313711.

It is a self number, because there is not a number n which added to its sum of digits gives 11731380.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11731381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2871 + ... + 5630.

It is an arithmetic number, because the mean of its divisors is an integer number (714168).

Almost surely, 2^11731380 is an apocalyptic number.

11731380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11731380 is an abundant number, since it is smaller than the sum of its proper divisors (22548684).

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

11731380 is a wasteful number, since it uses less digits than its factorization.

11731380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8536 (or 8534 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 11731380 is about 3425.1102172047. The cubic root of 11731380 is about 227.2216456349.

The spelling of 11731380 in words is "eleven million, seven hundred thirty-one thousand, three hundred eighty".