916973640 has 96 divisors (see below), whose sum is σ = 3251102400. Its totient is φ = 222295680.

The previous prime is 916973633. The next prime is 916973641. The reversal of 916973640 is 46379619.

916973640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (916973641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111820 + ... + 119739.

It is an arithmetic number, because the mean of its divisors is an integer number (33865650).

Almost surely, 2^916973640 is an apocalyptic number.

916973640 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

916973640 is an abundant number, since it is smaller than the sum of its proper divisors (2334128760).

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

916973640 is a wasteful number, since it uses less digits than its factorization.

916973640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231587 (or 231580 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 916973640 is about 30281.5726143805. The cubic root of 916973640 is about 971.5212040105.

The spelling of 916973640 in words is "nine hundred sixteen million, nine hundred seventy-three thousand, six hundred forty".