916497540 has 144 divisors (see below), whose sum is σ = 3364163712. Its totient is φ = 197157888.

The previous prime is 916497499. The next prime is 916497541. The reversal of 916497540 is 45794619.

916497540 is a `hidden beast` number, since 9 + 16 + 4 + 97 + 540 = 666.

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 (916497541) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 27 + ... + 42813.

It is an arithmetic number, because the mean of its divisors is an integer number (23362248).

Almost surely, 2^916497540 is an apocalyptic number.

916497540 is a gapful number since it is divisible by the number (90) 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 916497540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1682081856).

916497540 is an abundant number, since it is smaller than the sum of its proper divisors (2447666172).

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

916497540 is a wasteful number, since it uses less digits than its factorization.

916497540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42826 (or 42821 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 916497540 is about 30273.7103771573. The cubic root of 916497540 is about 971.3530343926.

The spelling of 916497540 in words is "nine hundred sixteen million, four hundred ninety-seven thousand, five hundred forty".