921010040 has 16 divisors (see below), whose sum is σ = 2072272680. Its totient is φ = 368404000.

The previous prime is 921010039. The next prime is 921010067. The reversal of 921010040 is 40010129.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11512586 + ... + 11512665.

Almost surely, 2^921010040 is an apocalyptic number.

It is an amenable number.

921010040 is an abundant number, since it is smaller than the sum of its proper divisors (1151262640).

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

921010040 is a wasteful number, since it uses less digits than its factorization.

921010040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23025262 (or 23025258 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 921010040 is about 30348.1472251602. The cubic root of 921010040 is about 972.9446212690.

Adding to 921010040 its reverse (40010129), we get a palindrome (961020169).

The spelling of 921010040 in words is "nine hundred twenty-one million, ten thousand, forty".