615215040 has 448 divisors, whose sum is σ = 2370124800. Its totient is φ = 133365760.

The previous prime is 615215033. The next prime is 615215087. The reversal of 615215040 is 40512516.

615215040 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 (24).

It is a self number, because there is not a number n which added to its sum of digits gives 615215040.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4128886 + ... + 4129034.

Almost surely, 2^615215040 is an apocalyptic number.

615215040 is a gapful number since it is divisible by the number (60) 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 615215040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1185062400).

615215040 is an abundant number, since it is smaller than the sum of its proper divisors (1754909760).

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

615215040 is a wasteful number, since it uses less digits than its factorization.

615215040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 615215040 is about 24803.5287812037. The cubic root of 615215040 is about 850.5026047122.

Adding to 615215040 its reverse (40512516), we get a palindrome (655727556).

The spelling of 615215040 in words is "six hundred fifteen million, two hundred fifteen thousand, forty".