915345540 has 72 divisors (see below), whose sum is σ = 2814623448. Its totient is φ = 240744960.

The previous prime is 915345523. The next prime is 915345581. The reversal of 915345540 is 45543519.

It can be written as a sum of positive squares in 4 ways, for example, as 4875264 + 910470276 = 2208^2 + 30174^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 915345495 and 915345504.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21691 + ... + 47970.

Almost surely, 2^915345540 is an apocalyptic number.

915345540 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

915345540 is an abundant number, since it is smaller than the sum of its proper divisors (1899277908).

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

915345540 is a wasteful number, since it uses less digits than its factorization.

915345540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69749 (or 69744 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 915345540 is about 30254.6779853959. The cubic root of 915345540 is about 970.9458800470.

The spelling of 915345540 in words is "nine hundred fifteen million, three hundred forty-five thousand, five hundred forty".