905981240 has 32 divisors (see below), whose sum is σ = 2046060000. Its totient is φ = 361041024.

The previous prime is 905981227. The next prime is 905981267. The reversal of 905981240 is 42189509.

It is a junction number, because it is equal to n+sod(n) for n = 905981194 and 905981203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31340 + ... + 52859.

It is an arithmetic number, because the mean of its divisors is an integer number (63939375).

Almost surely, 2^905981240 is an apocalyptic number.

It is an amenable number.

905981240 is an abundant number, since it is smaller than the sum of its proper divisors (1140078760).

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

905981240 is a wasteful number, since it uses less digits than its factorization.

905981240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84479 (or 84475 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 905981240 is about 30099.5222553449. The cubic root of 905981240 is about 967.6234875441.

The spelling of 905981240 in words is "nine hundred five million, nine hundred eighty-one thousand, two hundred forty".